diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/AdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/AdUnit.java
index fae031209..55954d6dc 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/AdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/AdUnit.java
@@ -432,12 +432,12 @@ public void setGpid(@Nullable String gpid) {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return configuration.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return configuration.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        configuration.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        configuration.setImpOrtbConfig(ortbConfig);
     }
 
     protected BidRequesterListener createBidListener(OnCompleteListener originalListener) {
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerAdUnit.java
index 32a319f57..255dcf480 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerAdUnit.java
@@ -69,12 +69,12 @@ HashSet<AdSize> getSizes() {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return configuration.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return configuration.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        configuration.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        configuration.setImpOrtbConfig(ortbConfig);
     }
 
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerBaseAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerBaseAdUnit.java
index 3b09d1bd3..dae7daeb0 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerBaseAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/BannerBaseAdUnit.java
@@ -80,12 +80,12 @@ public Parameters getParameters() {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return configuration.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return configuration.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        configuration.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        configuration.setImpOrtbConfig(ortbConfig);
     }
 
     /**
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/InterstitialAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/InterstitialAdUnit.java
index 64b7e6102..e2061b9e8 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/InterstitialAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/InterstitialAdUnit.java
@@ -71,12 +71,12 @@ public void setMinSizePercentage(
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return configuration.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return configuration.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        configuration.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        configuration.setImpOrtbConfig(ortbConfig);
     }
 
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/NativeAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/NativeAdUnit.java
index f2295545c..1ca894d67 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/NativeAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/NativeAdUnit.java
@@ -230,9 +230,9 @@ public NativeAdUnitConfiguration getNativeConfiguration() {
     }
 
     @Nullable
-    public String getOrtbConfig() {return configuration.getOrtbConfig();}
+    public String getImpOrtbConfig() {return configuration.getImpOrtbConfig();}
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {configuration.setOrtbConfig(ortbConfig);}
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {configuration.setImpOrtbConfig(ortbConfig);}
 
 
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/OpenRtbMerger.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/OpenRtbMerger.java
new file mode 100644
index 000000000..b76c4c55c
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/OpenRtbMerger.java
@@ -0,0 +1,178 @@
+package org.prebid.mobile;
+
+import android.os.Build;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.Iterator;
+
+/**
+ * The OpenRtbMerger class provides functionality to merge a given JSON request object
+ * with an OpenRTB string representation.
+ */
+public class OpenRtbMerger {
+
+    private static final String TAG = "OpenRtbMerger";
+
+    private OpenRtbMerger() {
+    }
+
+    /**
+     * It merges the SDK originalRequest and OpenRTB string.
+     *
+     * @param originalRequest original request
+     * @param openRtb         OpenRTB string
+     * @return merged JSON object
+     */
+    @NonNull
+    public static JSONObject globalMerge(@NonNull JSONObject originalRequest, String openRtb) {
+        if (openRtb == null || openRtb.isEmpty()) {
+            return originalRequest;
+        }
+
+        try {
+            JSONObject openRtbJson = new JSONObject(openRtb);
+            removeSensitiveData(openRtbJson);
+            return merge(originalRequest, openRtbJson);
+        } catch (Exception e) {
+            LogUtil.error(TAG, "Can't merge OpenRTB config: " + e.getMessage());
+        }
+
+        return originalRequest;
+    }
+
+    @NonNull
+    private static JSONObject merge(JSONObject requestJsonRoot, JSONObject openRtbJsonRoot) throws JSONException {
+        for (Iterator<String> it = openRtbJsonRoot.keys(); it.hasNext(); ) {
+            String openRtbKey = it.next();
+            Object openRtbValue = openRtbJsonRoot.opt(openRtbKey);
+
+            boolean newFieldForRequest = !requestJsonRoot.has(openRtbKey);
+            if (newFieldForRequest) {
+                requestJsonRoot.put(openRtbKey, openRtbValue);
+                continue;
+            }
+
+            Object requestValue = requestJsonRoot.opt(openRtbKey);
+            if (openRtbValue instanceof JSONObject openRtbJson && requestValue instanceof JSONObject requestJson) {
+                merge(requestJson, openRtbJson);
+                continue;
+            }
+
+            if (openRtbValue instanceof JSONArray openRtbJsonArray && requestValue instanceof JSONArray requestJsonArray) {
+                merge(requestJsonArray, openRtbJsonArray, openRtbKey, requestJsonRoot);
+                continue;
+            }
+
+            requestJsonRoot.put(openRtbKey, openRtbValue);
+        }
+        return requestJsonRoot;
+    }
+
+    private static void merge(JSONArray requestJsonArray, JSONArray openRtbJsonArray, String key, JSONObject parentJson) throws JSONException {
+        if (openRtbJsonArray.length() == 0) {
+            return;
+        }
+
+        if (requestJsonArray.length() == 0) {
+            for (int i = 0; i < openRtbJsonArray.length(); i++) {
+                requestJsonArray.put(i, openRtbJsonArray.get(i));
+            }
+            return;
+        }
+
+        boolean differentItemTypes = requestJsonArray.opt(0).getClass() != openRtbJsonArray.opt(0).getClass();
+        if (differentItemTypes) {
+            LogUtil.verbose(TAG, "JSON arrays of different types. Rewriting with OpenRTB values...");
+            parentJson.put(key, openRtbJsonArray);
+            return;
+        }
+
+        for (int i = 0; i < openRtbJsonArray.length(); i++) {
+            Object openRtbValue = openRtbJsonArray.get(i);
+            requestJsonArray.put(openRtbValue);
+        }
+    }
+
+    private static void removeSensitiveData(@NonNull JSONObject openRtbJson) {
+        JSONObject userJson = openRtbJson.optJSONObject("user");
+        JSONObject extJson = userJson != null ? userJson.optJSONObject("ext") : null;
+        removeFields(extJson, FIELDS_USER_EXT);
+
+        removeFields(openRtbJson.optJSONObject("regs"), FIELDS_REGS);
+        removeFields(openRtbJson.optJSONObject("geo"), FIELDS_GEO);
+        removeFields(openRtbJson.optJSONObject("device"), FIELDS_DEVICE);
+    }
+
+    private static void removeFields(@Nullable JSONObject json, String... fields) {
+        if (json == null) return;
+
+        for (String field : fields) {
+            json.remove(field);
+        }
+    }
+
+
+    private static final String[] FIELDS_USER_EXT = {
+            "consent"
+    };
+
+    private static final String[] FIELDS_REGS = {
+            "gdpr",
+            "us_privacy",
+            "coppa"
+    };
+
+    private static final String[] FIELDS_GEO = {
+            "lat",
+            "lon",
+            "type",
+            "accuracy",
+            "lastfix",
+            "country",
+            "region",
+            "regionfips104",
+            "metro",
+            "city",
+            "zip",
+            "utcoffset"
+    };
+
+    private static final String[] FIELDS_DEVICE = {
+            "ua",
+            "dnt",
+            "lmt",
+            "ip",
+            "ipv6",
+            "devicetype",
+            "make",
+            "model",
+            "os",
+            "osv",
+            "hwv",
+            "flashver",
+            "language",
+            "carrier",
+            "mccmnc",
+            "ifa",
+            "didsha1",
+            "didmd5",
+            "dpidsha1",
+            "dpidmd5",
+            "h",
+            "w",
+            "ppi",
+            "js",
+            "connectiontype",
+            "pxratio",
+            "geo",
+            "ext"
+    };
+
+}
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/TargetingParams.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/TargetingParams.java
index 69095b7e0..e72f089fc 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/TargetingParams.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/TargetingParams.java
@@ -57,6 +57,8 @@ public class TargetingParams {
     private static String omidPartnerName;
     private static String omidPartnerVersion;
     private static String userCustomData;
+    @Nullable
+    private static String openRtbConfig;
     private static Pair<Float, Float> userLatLon;
     private static Ext userExt;
     private static JSONArray extendedUserIds;
@@ -795,6 +797,18 @@ public static Boolean getDeviceAccessConsent() {
         return UserConsentUtils.tryToGetDeviceAccessConsent();
     }
 
+    @Nullable
+    public static String getGlobalOrtbConfig() {
+        return openRtbConfig;
+    }
+
+    /**
+     * Sets global OpenRTB JSON string for merging with the original request.
+     */
+    public static void setGlobalOrtbConfig(String config) {
+        openRtbConfig = config;
+    }
+
 
     /* -------------------- Ext -------------------- */
 
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/VideoBaseAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/VideoBaseAdUnit.java
index b984a78e0..61c19708e 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/VideoBaseAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/VideoBaseAdUnit.java
@@ -43,9 +43,9 @@ public void setVideoParameters(@Nullable VideoParameters parameters) {
     }
 
     @Nullable
-    public String getOrtbConfig() { return configuration.getOrtbConfig(); }
+    public String getImpOrtbConfig() { return configuration.getImpOrtbConfig(); }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) { configuration.setOrtbConfig(ortbConfig);}
+    public void setImpOrtbConfig(@Nullable String ortbConfig) { configuration.setImpOrtbConfig(ortbConfig);}
 
     /**
      * @deprecated use `setVideoParameters()`
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/mediation/MediationBaseAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/mediation/MediationBaseAdUnit.java
index fd0ee6b27..7ac3f06ec 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/mediation/MediationBaseAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/mediation/MediationBaseAdUnit.java
@@ -322,12 +322,12 @@ private void cancelRefresh() {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return adUnitConfig.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return adUnitConfig.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        adUnitConfig.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        adUnitConfig.setImpOrtbConfig(ortbConfig);
     }
 
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BannerView.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BannerView.java
index b020e92a4..d49645246 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BannerView.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BannerView.java
@@ -688,12 +688,12 @@ public BidResponse getBidResponse() {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return adUnitConfig.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return adUnitConfig.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        adUnitConfig.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        adUnitConfig.setImpOrtbConfig(ortbConfig);
     }
 
     //region ==================== HelperMethods for Unit Tests. Should be used only in tests
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BaseInterstitialAdUnit.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BaseInterstitialAdUnit.java
index f5bb7bf99..d998069fa 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BaseInterstitialAdUnit.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/BaseInterstitialAdUnit.java
@@ -282,12 +282,12 @@ public void clearUserData() {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return adUnitConfig.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return adUnitConfig.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        adUnitConfig.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        adUnitConfig.setImpOrtbConfig(ortbConfig);
     }
 
 
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/DisplayView.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/DisplayView.java
index fded8f015..94d831fde 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/DisplayView.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/DisplayView.java
@@ -92,11 +92,11 @@ public void destroy() {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return adUnitConfiguration.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return adUnitConfiguration.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        adUnitConfiguration.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        adUnitConfiguration.setImpOrtbConfig(ortbConfig);
     }
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/PrebidDisplayView.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/PrebidDisplayView.java
index 2aecdd72c..74db9efc8 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/PrebidDisplayView.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/api/rendering/PrebidDisplayView.java
@@ -331,12 +331,12 @@ private static BidResponse getBidResponseFromCache(String id) throws AdException
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return adUnitConfiguration.getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return adUnitConfiguration.getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        adUnitConfiguration.setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        adUnitConfiguration.setImpOrtbConfig(ortbConfig);
     }
 
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/configuration/AdUnitConfiguration.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/configuration/AdUnitConfiguration.java
index 3ca8c41b7..09782532f 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/configuration/AdUnitConfiguration.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/configuration/AdUnitConfiguration.java
@@ -58,7 +58,7 @@ public class AdUnitConfiguration {
     @Nullable
     private String gpid;
     @Nullable
-    private String ortbConfig;
+    private String impOrtbConfig;
 
     private Position closeButtonPosition = Position.TOP_RIGHT;
     private Position skipButtonPosition = Position.TOP_RIGHT;
@@ -543,12 +543,12 @@ public void setGpid(@Nullable String gpid) {
     }
 
     @Nullable
-    public String getOrtbConfig() {
-        return ortbConfig;
+    public String getImpOrtbConfig() {
+        return impOrtbConfig;
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        this.ortbConfig = ortbConfig;
+    public void setImpOrtbConfig(@Nullable String impOrtbConfig) {
+        this.impOrtbConfig = impOrtbConfig;
     }
 
     @Override
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/BidRequest.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/BidRequest.java
index 5ee282ba3..0d9c8b936 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/BidRequest.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/BidRequest.java
@@ -23,13 +23,13 @@
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
-import org.prebid.mobile.LogUtil;
+import org.prebid.mobile.OpenRtbMerger;
 import org.prebid.mobile.PrebidMobile;
+import org.prebid.mobile.TargetingParams;
 import org.prebid.mobile.rendering.models.openrtb.bidRequests.*;
 import org.prebid.mobile.rendering.models.openrtb.bidRequests.source.Source;
 
 import java.util.ArrayList;
-import java.util.Iterator;
 
 public class BidRequest extends BaseBid {
 
@@ -41,22 +41,19 @@ public class BidRequest extends BaseBid {
     private User user = null;
     private Source source = null;
     @Nullable
-    private JSONObject arbitraryJSONConfig;
-    @Nullable
-    private String ortbConfig;
+    private String impOrtbConfig;
     private Ext ext = null;
 
     public JSONObject getJsonObject() throws JSONException {
         JSONObject jsonObject = new JSONObject();
-        if (arbitraryJSONConfig != null) {
-            deepMerge(arbitraryJSONConfig, jsonObject);
-        }
         if (imps != null && imps.size() > 0) {
 
             JSONArray jsonArray = new JSONArray();
 
             for (Imp i : imps) {
-                jsonArray.put(i.getJsonObject());
+                JSONObject impJson = i.getJsonObject();
+                impJson = OpenRtbMerger.globalMerge(impJson, impOrtbConfig);
+                jsonArray.put(impJson);
             }
 
             toJSON(jsonObject, "imp", jsonArray);
@@ -70,73 +67,10 @@ public JSONObject getJsonObject() throws JSONException {
         toJSON(jsonObject, "source", source != null ? source.getJsonObject() : null);
         toJSON(jsonObject, "ext", ext != null ? ext.getJsonObject() : null);
         toJSON(jsonObject, "test", PrebidMobile.getPbsDebug() ? 1 : null);
-        jsonObject = mergeOrtbConfig(jsonObject);
+        jsonObject = OpenRtbMerger.globalMerge(jsonObject, TargetingParams.getGlobalOrtbConfig());
         return jsonObject;
     }
 
-    private JSONObject mergeOrtbConfig(JSONObject bidRequestJson) {
-        try {
-            if (ortbConfig == null) {
-                return bidRequestJson;
-            }
-            JSONObject ortbConfigObject = new JSONObject(ortbConfig);
-            //remove protected fields
-            if (ortbConfigObject.has("regs")) {
-                ortbConfigObject.remove("regs");
-            }
-            if (ortbConfigObject.has("device")) {
-                ortbConfigObject.remove("device");
-            }
-            if (ortbConfigObject.has("geo")) {
-                ortbConfigObject.remove("geo");
-            }
-            if (ortbConfigObject.has("ext")) {
-                if (ortbConfigObject.get("ext") instanceof JSONObject) {
-                    ortbConfigObject.getJSONObject("ext").remove("gdpr");
-                    ortbConfigObject.getJSONObject("ext").remove("us_privacy");
-                    ortbConfigObject.getJSONObject("ext").remove("consent");
-                }
-            }
-            return deepMerge(ortbConfigObject, bidRequestJson);
-        } catch(Exception e) {
-            LogUtil.error("ORTBConfig is not valid JSON");
-            return bidRequestJson;
-        }
-    }
-
-    /**
-     * Merge "source" into "target". If fields have equal name, merge them recursively.
-     * @return the merged object (target).
-     */
-    private static JSONObject deepMerge(JSONObject source, JSONObject target) throws JSONException {
-        for (Iterator<String> it = source.keys(); it.hasNext(); ) {
-            String key = it.next();
-            Object value = source.get(key);
-            if (!target.has(key)) {
-                // new value for "key":
-                target.put(key, value);
-            } else {
-                // existing value for "key" - recursively deep merge:
-                if (value instanceof JSONObject) {
-                    JSONObject valueJson = (JSONObject) value;
-                    deepMerge(valueJson, target.getJSONObject(key));
-                } else if (value instanceof JSONArray) {
-                    if (target.get(key) instanceof JSONArray) {
-                        JSONArray sourceArray = (JSONArray) value;
-                        for (int i = 0; i < sourceArray.length(); i++) {
-                            target.getJSONArray(key).put(sourceArray.getJSONObject(i));
-                        }
-                    }
-                } else {
-                    target.put(key, value);
-                }
-            }
-        }
-        return target;
-    }
-
-    // Accessors to prevent NPE while maintaining null if object is not set
-
     // App
     public App getApp() {
         if (app == null) {
@@ -227,20 +161,11 @@ public Ext getExt() {
     }
 
     @Nullable
-    public JSONObject getArbitraryConfig() {
-        return arbitraryJSONConfig;
-    }
-
-    public void setArbitraryConfig(@Nullable JSONObject config) {
-        this.arbitraryJSONConfig = config;
-    }
-
-    @Nullable
-    public String getOrtbConfig() {
-        return ortbConfig;
+    public String getImpOrtbConfig() {
+        return impOrtbConfig;
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        this.ortbConfig = ortbConfig;
+    public void setImpOrtbConfig(@Nullable String impOrtbConfig) {
+        this.impOrtbConfig = impOrtbConfig;
     }
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Device.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Device.java
index b18d94d5d..24fa666d8 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Device.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Device.java
@@ -75,6 +75,9 @@ public class Device extends BaseBid {
 
     private Ext ext;
 
+    /**
+     * When you add a new field to this list, don't forget to add it to the {@link org.prebid.mobile.OpenRtbMerger}.
+     */
     public JSONObject getJsonObject() throws JSONException {
         JSONObject jsonObject = new JSONObject();
 
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Regs.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Regs.java
index 779c5e0b3..aca2c6240 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Regs.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/Regs.java
@@ -34,6 +34,9 @@ public class Regs extends BaseBid {
     @Nullable
     private JSONArray gppSid;
 
+    /**
+     * When you add a new field to this list, don't forget to add it to the {@link org.prebid.mobile.OpenRtbMerger}.
+     */
     public JSONObject getJsonObject() throws JSONException {
         JSONObject jsonObject = new JSONObject();
 
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/geo/Geo.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/geo/Geo.java
index 7a1c1901f..bb5c1cfea 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/geo/Geo.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/models/openrtb/bidRequests/geo/Geo.java
@@ -40,6 +40,9 @@ public class Geo extends BaseBid {
     public String zip = null;
     public Integer utcoffset = null;
 
+    /**
+     * When you add a new field to this list, don't forget to add it to the {@link org.prebid.mobile.OpenRtbMerger}.
+     */
     public JSONObject getJsonObject() throws JSONException {
         JSONObject jsonObject = new JSONObject();
         toJSON(jsonObject, "lat", this.lat);
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilder.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilder.java
index 84ce89725..b8461b134 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilder.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilder.java
@@ -32,6 +32,7 @@
 import org.prebid.mobile.BannerParameters;
 import org.prebid.mobile.DataObject;
 import org.prebid.mobile.ExternalUserId;
+import org.prebid.mobile.OpenRtbMerger;
 import org.prebid.mobile.PrebidMobile;
 import org.prebid.mobile.Signals;
 import org.prebid.mobile.TargetingParams;
@@ -140,7 +141,7 @@ private void configureImpObject(Imp imp, String uuid) {
 
     private void configureBidRequest(BidRequest bidRequest, String uuid) {
         bidRequest.setId(uuid);
-        bidRequest.setOrtbConfig(adConfiguration.getOrtbConfig());
+        bidRequest.setImpOrtbConfig(adConfiguration.getImpOrtbConfig());
         boolean isVideo = adConfiguration.isAdType(AdFormat.VAST);
         bidRequest.getExt().put("prebid", Prebid.getJsonObjectForBidRequest(PrebidMobile.getPrebidServerAccountId(), isVideo, adConfiguration));
         //if coppaEnabled - set 1, else No coppa is sent
diff --git a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/views/base/BaseAdView.java b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/views/base/BaseAdView.java
index be5c8e2ff..130eff9b0 100644
--- a/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/views/base/BaseAdView.java
+++ b/PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/views/base/BaseAdView.java
@@ -138,12 +138,12 @@ public void destroy() {
 
 
     @Nullable
-    public String getOrtbConfig() {
-        return adViewManager.getAdConfiguration().getOrtbConfig();
+    public String getImpOrtbConfig() {
+        return adViewManager.getAdConfiguration().getImpOrtbConfig();
     }
 
-    public void setOrtbConfig(@Nullable String ortbConfig) {
-        adViewManager.getAdConfiguration().setOrtbConfig(ortbConfig);
+    public void setImpOrtbConfig(@Nullable String ortbConfig) {
+        adViewManager.getAdConfiguration().setImpOrtbConfig(ortbConfig);
     }
 
 }
diff --git a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/OpenRtbMergerTest.java b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/OpenRtbMergerTest.java
new file mode 100644
index 000000000..5ffffdb74
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/OpenRtbMergerTest.java
@@ -0,0 +1,134 @@
+package org.prebid.mobile;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.fge.jsonpatch.diff.JsonDiff;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.junit.Test;
+import org.prebid.mobile.test.utils.ResourceUtils;
+
+public class OpenRtbMergerTest {
+
+    @Test
+    public void merge_emptyOpenRtb() throws JSONException {
+        String request = "{}";
+        String openRtb = "";
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        assertJsonEquals("{}", mergedJson.toString());
+    }
+
+    @Test
+    public void merge_wrongJson() throws JSONException {
+        String request = "{}";
+        String openRtb = "not a json string";
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        assertJsonEquals("{}", mergedJson.toString());
+    }
+
+    @Test
+    public void mergeSensitiveData_emptyRequest_emptyResult() throws JSONException {
+        String request = "{}";
+        String openRtb = fromResources("sensitive_data_fake.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        assertJsonEquals(fromResources("sensitive_data_empty.json"), mergedJson.toString());
+    }
+
+    @Test
+    public void mergeSensitiveData_fullRequest_requestFieldsAreNotChanged() throws JSONException {
+        String request = fromResources("sensitive_data_real.json");
+        String openRtb = fromResources("sensitive_data_fake.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        assertJsonEquals(request, mergedJson.toString());
+    }
+
+    @Test
+    public void merge_differentTypes() throws JSONException {
+        String request = "{}";
+        String openRtb = fromResources("merge_all_types.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        assertJsonEquals(openRtb, mergedJson.toString());
+    }
+
+    @Test
+    public void mergeComplex_withReplace() throws JSONException {
+        String request = fromResources("merge_with_replace_request.json");
+        String openRtb = fromResources("merge_with_replace_openrtb.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        String result = fromResources("merge_with_replace_result.json");
+        assertJsonEquals(result, mergedJson.toString());
+    }
+
+    @Test
+    public void merge_replaceWithNewType() throws JSONException {
+        String request = fromResources("merge_replace_with_new_type_request.json");
+        String openRtb = fromResources("merge_replace_with_new_type_openrtb.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        assertJsonEquals(openRtb, mergedJson.toString());
+    }
+
+    @Test
+    public void merge_arrayPrimitives() throws JSONException {
+        String request = fromResources("merge_arrays_primitives_request.json");
+        String openRtb = fromResources("merge_arrays_primitives_openrtb.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        String result = fromResources("merge_arrays_primitives_result.json");
+        assertJsonEquals(result, mergedJson.toString());
+    }
+
+    @Test
+    public void merge_arrayObjects() throws JSONException {
+        String request = fromResources("merge_arrays_objects_request.json");
+        String openRtb = fromResources("merge_arrays_objects_openrtb.json");
+
+        JSONObject mergedJson = merge(request, openRtb);
+
+        String result = fromResources("merge_arrays_objects_result.json");
+        assertJsonEquals(result, mergedJson.toString());
+    }
+
+    private JSONObject merge(String request, String openRtb) throws JSONException {
+        JSONObject requestJson = new JSONObject(request);
+        return OpenRtbMerger.globalMerge(requestJson, openRtb);
+    }
+
+    private String fromResources(String path) {
+        return ResourceUtils.convertResourceToString("OpenRtbMerger/" + path);
+    }
+
+    private void assertJsonEquals(String json1, String json2) {
+        try {
+            ObjectMapper mapper = new ObjectMapper();
+            JsonNode beforeNode = mapper.readTree(json1);
+            JsonNode afterNode = mapper.readTree(json2);
+
+            String difference = JsonDiff.asJson(beforeNode, afterNode).toString();
+            if (difference.equals("[]")) {
+                return;
+            }
+
+            throw new AssertionError("Json values are different: " + difference);
+        } catch (JsonProcessingException e) {
+            throw new NullPointerException("Can't compare: " + e.getMessage());
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/PrebidNativeAdTest.java b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/PrebidNativeAdTest.java
index 7f2475834..b3941c190 100644
--- a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/PrebidNativeAdTest.java
+++ b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/PrebidNativeAdTest.java
@@ -108,13 +108,9 @@ public void nativeAdParser() {
 
 
     private PrebidNativeAd nativeAdFromFile(String path) {
-        try {
-            String resource = ResourceUtils.convertResourceToString(path);
-            String cacheId = CacheManager.save(resource);
-            return PrebidNativeAd.create(cacheId);
-        } catch (IOException e) {
-            throw new NullPointerException(e.getMessage());
-        }
+        String resource = ResourceUtils.convertResourceToString(path);
+        String cacheId = CacheManager.save(resource);
+        return PrebidNativeAd.create(cacheId);
     }
 
     private View createViewMock() {
diff --git a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/WinNotifierTest.java b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/WinNotifierTest.java
index 592fc45bb..95bd8be0f 100644
--- a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/WinNotifierTest.java
+++ b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/WinNotifierTest.java
@@ -258,12 +258,7 @@ public MockResponse dispatch(
                 String adMarkup = "";
                 switch (path) {
                     case "/cache?uuid=id":
-                        try {
-                            adMarkup = ResourceUtils.convertResourceToString(PATH_BID_SHORT_JSON);
-                        }
-                        catch (IOException e) {
-                            e.printStackTrace();
-                        }
+                        adMarkup = ResourceUtils.convertResourceToString(PATH_BID_SHORT_JSON);
                         break;
                     case "/cache?uuid=nurl":
                     case "/cache?uuid=uuid":
diff --git a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilderTest.java b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilderTest.java
index 4a3ae0bc7..791ccdafa 100644
--- a/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilderTest.java
+++ b/PrebidMobile/PrebidMobile-core/src/test/java/org/prebid/mobile/rendering/networking/parameters/BasicParameterBuilderTest.java
@@ -127,6 +127,7 @@ public void cleanup() throws Exception {
         TargetingParams.setYearOfBirth(0);
         TargetingParams.setOmidPartnerName(null);
         TargetingParams.setOmidPartnerVersion(null);
+        TargetingParams.setGlobalOrtbConfig(null);
 
         PrebidMobile.sendMraidSupportParams = true;
         PrebidMobile.useExternalBrowser = false;
@@ -350,10 +351,10 @@ public void setGpid_gpidPresentInRequest() {
     }
 
     @Test
-    public void setOrtbConfig_configPresentInRequest() {
+    public void setImpOrtbConfig_configPresentInRequest() {
         AdUnitConfiguration adConfiguration = new AdUnitConfiguration();
         String ortbConfig = "{\"arbitraryparamkey1\":\"arbitraryparamvalue1\",\"ext\":{\"otherExtParam\":\"otherParam\"}}";
-        adConfiguration.setOrtbConfig(ortbConfig);
+        TargetingParams.setGlobalOrtbConfig(ortbConfig);
 
         BasicParameterBuilder builder = new BasicParameterBuilder(
                 adConfiguration,
@@ -373,10 +374,10 @@ public void setOrtbConfig_configPresentInRequest() {
     }
 
     @Test
-    public void setOrtbConfig_invalidJSONInRequest() {
+    public void setImpOrtbConfig_invalidJSONInRequest() {
         AdUnitConfiguration adConfiguration = new AdUnitConfiguration();
         String ortbConfig = "\"arbitraryparamkey1\":\"arbitraryparamvalue1\"}";
-        adConfiguration.setOrtbConfig(ortbConfig);
+        adConfiguration.setImpOrtbConfig(ortbConfig);
 
         BasicParameterBuilder builder = new BasicParameterBuilder(
                 adConfiguration,
@@ -395,10 +396,10 @@ public void setOrtbConfig_invalidJSONInRequest() {
     }
 
     @Test
-    public void setOrtbConfig_illegalParametersPresentInRequest() {
+    public void setImpOrtbConfig_illegalParametersPresentInRequest() {
         AdUnitConfiguration adConfiguration = new AdUnitConfiguration();
-        String ortbConfig = "{\"arbitraryparamkey1\":\"arbitraryparamvalue1\", \"regs\": \"no regs here\", \"ext\":{\"gdpr\":\"no GDPR here\", \"otherExtParam\":\"otherParam\"}}";
-        adConfiguration.setOrtbConfig(ortbConfig);
+        String ortbConfig = "{\"arbitraryparamkey1\":\"arbitraryparamvalue1\", \"ext\":{\"otherExtParam\":\"otherParam\"}}";
+        TargetingParams.setGlobalOrtbConfig(ortbConfig);
 
         BasicParameterBuilder builder = new BasicParameterBuilder(
                 adConfiguration,
@@ -412,8 +413,6 @@ public void setOrtbConfig_illegalParametersPresentInRequest() {
         try {
             assertEquals("arbitraryparamvalue1", actualBidRequest.getJsonObject().getString("arbitraryparamkey1"));
             assertEquals("otherParam", actualBidRequest.getJsonObject().getJSONObject("ext").getString("otherExtParam"));
-            assertFalse(actualBidRequest.getJsonObject().getJSONObject("ext").has("gdpr"));
-            assertFalse(actualBidRequest.getJsonObject().has("regs"));
         } catch (Exception e) {
             fail();
         }
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_all_types.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_all_types.json
new file mode 100644
index 000000000..7d51a273c
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_all_types.json
@@ -0,0 +1,22 @@
+{
+  "field_int": 1,
+  "field_string": "test",
+  "field_double": 2.5,
+  "field_boolean": true,
+  "object": {
+    "subfield_1": 3,
+    "subfield_2": "inner",
+    "sub_object": {
+      "subfield_3": true,
+      "subfield_4": [
+        1,2,3
+      ]
+    }
+  },
+  "array_int": [
+    1,2,3,4
+  ],
+  "array_string": [
+    "hello", "world"
+  ]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_openrtb.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_openrtb.json
new file mode 100644
index 000000000..06de6e03f
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_openrtb.json
@@ -0,0 +1,11 @@
+{
+  "imp": [
+    {
+      "number": 2,
+      "adm": "<html2>",
+      "sizes": [
+        "320x50", "300x250"
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_request.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_request.json
new file mode 100644
index 000000000..6a9b25137
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_request.json
@@ -0,0 +1,8 @@
+{
+  "imp": [
+    {
+      "number": 1,
+      "adm": "<html1>"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_result.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_result.json
new file mode 100644
index 000000000..67222abca
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_objects_result.json
@@ -0,0 +1,15 @@
+{
+  "imp": [
+    {
+      "number": 1,
+      "adm": "<html1>"
+    },
+    {
+      "number": 2,
+      "adm": "<html2>",
+      "sizes": [
+        "320x50", "300x250"
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_openrtb.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_openrtb.json
new file mode 100644
index 000000000..0e5e50c59
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_openrtb.json
@@ -0,0 +1,6 @@
+{
+  "ints": [4, 5],
+  "strings": ["4", "5"],
+  "doubles": [0.4, 0.5],
+  "booleans": [false]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_request.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_request.json
new file mode 100644
index 000000000..bcd9a58d5
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_request.json
@@ -0,0 +1,6 @@
+{
+  "ints": [1,2,3],
+  "strings": ["1", "2", "3"],
+  "doubles": [0.1, 0.2, 0.3],
+  "booleans": [true]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_result.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_result.json
new file mode 100644
index 000000000..1a6acfd14
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_arrays_primitives_result.json
@@ -0,0 +1,6 @@
+{
+  "ints": [1,2,3,4, 5],
+  "strings": ["1", "2", "3","4", "5"],
+  "doubles": [0.1, 0.2, 0.3, 0.4, 0.5],
+  "booleans": [true, false]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_replace_with_new_type_openrtb.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_replace_with_new_type_openrtb.json
new file mode 100644
index 000000000..a3e073e83
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_replace_with_new_type_openrtb.json
@@ -0,0 +1,11 @@
+{
+  "type_1": "str",
+  "type_2": 1,
+  "type_3": 0.5,
+  "type_4": true,
+  "type_5": [
+    1,
+    2,
+    3
+  ]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_replace_with_new_type_request.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_replace_with_new_type_request.json
new file mode 100644
index 000000000..be3115c73
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_replace_with_new_type_request.json
@@ -0,0 +1,9 @@
+{
+  "type_1": 1,
+  "type_2": 0.2,
+  "type_3": true,
+  "type_4": "str",
+  "type_5": {
+    "field": "test"
+  }
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_openrtb.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_openrtb.json
new file mode 100644
index 000000000..09521dea4
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_openrtb.json
@@ -0,0 +1,34 @@
+{
+  "field_int": 2,
+  "field_string": "replaced",
+  "field_double": 3.5,
+  "field_boolean": false,
+  "field_simple": {
+    "subfield_1": "str",
+    "subfield_2": 11
+  },
+  "object": {
+    "subfield_1": 4,
+    "subfield_2": "inner_replaced",
+    "sub_object": {
+      "subfield_3": false,
+      "subfield_4": [
+        4, 5
+      ]
+    }
+  },
+  "array_int": [
+    1,2,3
+  ],
+  "array_string": [
+    "!"
+  ],
+  "new_field": "yes",
+  "new_object": {
+    "subobject": {
+      "ext": {
+        "type": "test"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_request.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_request.json
new file mode 100644
index 000000000..6da8f3efe
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_request.json
@@ -0,0 +1,21 @@
+{
+  "field_int": 1,
+  "field_string": "test",
+  "field_double": 2.5,
+  "field_boolean": true,
+  "field_simple": 10,
+  "object": {
+    "subfield_1": 3,
+    "subfield_2": "inner",
+    "sub_object": {
+      "subfield_3": true,
+      "subfield_4": [
+        1,2,3
+      ]
+    }
+  },
+  "array_int": [],
+  "array_string": [
+    "hello", "world"
+  ]
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_result.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_result.json
new file mode 100644
index 000000000..a8386cd6e
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/merge_with_replace_result.json
@@ -0,0 +1,42 @@
+{
+  "field_int": 2,
+  "array_string": [
+    "hello",
+    "world",
+    "!"
+  ],
+  "field_double": 3.5,
+  "field_boolean": false,
+  "field_string": "replaced",
+  "field_simple": {
+    "subfield_1": "str",
+    "subfield_2": 11
+  },
+  "object": {
+    "sub_object": {
+      "subfield_3": false,
+      "subfield_4": [
+        1,
+        2,
+        3,
+        4,
+        5
+      ]
+    },
+    "subfield_1": 4,
+    "subfield_2": "inner_replaced"
+  },
+  "array_int": [
+    1,
+    2,
+    3
+  ],
+  "new_field": "yes",
+  "new_object": {
+    "subobject": {
+      "ext": {
+        "type": "test"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_empty.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_empty.json
new file mode 100644
index 000000000..a7f1713c7
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_empty.json
@@ -0,0 +1,12 @@
+{
+  "user": {
+    "ext": {
+    }
+  },
+  "regs": {
+  },
+  "geo": {
+  },
+  "device": {
+  }
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_fake.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_fake.json
new file mode 100644
index 000000000..7f43138f1
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_fake.json
@@ -0,0 +1,58 @@
+{
+  "user": {
+    "ext": {
+      "consent": "fake"
+    }
+  },
+  "regs": {
+    "gdpr": "fake",
+    "us_privacy": "fake",
+    "coppa": "fake"
+  },
+  "geo": {
+    "lat": "fake",
+    "lon": "fake",
+    "type": "fake",
+    "accuracy": "fake",
+    "lastfix": "fake",
+    "country": "fake",
+    "region": "fake",
+    "regionfips104": "fake",
+    "metro": "fake",
+    "city": "fake",
+    "zip": "fake",
+    "utcoffset": "fake"
+  },
+  "device": {
+    "ua": 123,
+    "dnt": 123.45,
+    "lmt": {
+      "fake": "fake"
+    },
+    "ip": "fake",
+    "ipv6":  "fake",
+    "devicetype": "fake",
+    "make":  "fake",
+    "model": "fake",
+    "os":  "fake",
+    "osv": "fake",
+    "hwv":  "fake",
+    "flashver": "fake",
+    "language":  "fake",
+    "carrier": "fake",
+    "mccmnc":  "fake",
+    "ifa": "fake",
+    "didsha1":  "fake",
+    "didmd5": "fake",
+    "dpidsha1":  "fake",
+    "dpidmd5": "fake",
+    "h":  "fake",
+    "w": "fake",
+    "ppi":  "fake",
+    "js": "fake",
+    "connectiontype":  "fake",
+    "pxratio": "fake",
+    "geo":  "fake",
+    "ext": "fake"
+  }
+}
\ No newline at end of file
diff --git a/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_real.json b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_real.json
new file mode 100644
index 000000000..ca59c407b
--- /dev/null
+++ b/PrebidMobile/PrebidMobile-core/src/test/resources/OpenRtbMerger/sensitive_data_real.json
@@ -0,0 +1,56 @@
+{
+  "user": {
+    "ext": {
+      "consent": "real"
+    }
+  },
+  "regs": {
+    "gdpr": "real",
+    "us_privacy": "real",
+    "coppa": "real"
+  },
+  "geo": {
+    "lat": "real",
+    "lon": "real",
+    "type": "real",
+    "accuracy": "real",
+    "lastfix": "real",
+    "country": "real",
+    "region": "real",
+    "regionfips104": "real",
+    "metro": "real",
+    "city": "real",
+    "zip": "real",
+    "utcoffset": "real"
+  },
+  "device": {
+    "ua": "real",
+    "dnt": "real",
+    "lmt":  "real",
+    "ip": "real",
+    "ipv6":  "real",
+    "devicetype": "real",
+    "make":  "real",
+    "model": "real",
+    "os":  "real",
+    "osv": "real",
+    "hwv":  "real",
+    "flashver": "real",
+    "language":  "real",
+    "carrier": "real",
+    "mccmnc":  "real",
+    "ifa": "real",
+    "didsha1":  "real",
+    "didmd5": "real",
+    "dpidsha1":  "real",
+    "dpidmd5": "real",
+    "h":  "real",
+    "w": "real",
+    "ppi":  "real",
+    "js": "real",
+    "connectiontype":  "real",
+    "pxratio": "real",
+    "geo":  "real",
+    "ext": "real"
+  }
+}
\ No newline at end of file
diff --git a/PrebidMobile/test-utils/src/main/java/org/prebid/mobile/test/utils/ResourceUtils.java b/PrebidMobile/test-utils/src/main/java/org/prebid/mobile/test/utils/ResourceUtils.java
index 2f07ae59d..ca21b9bdd 100644
--- a/PrebidMobile/test-utils/src/main/java/org/prebid/mobile/test/utils/ResourceUtils.java
+++ b/PrebidMobile/test-utils/src/main/java/org/prebid/mobile/test/utils/ResourceUtils.java
@@ -31,11 +31,15 @@ public class ResourceUtils {
     public final static String ACCEPT_HEADER = "Accept";
     public final static String ACCEPT_HEADER_VALUE = "application/x-www-form-urlencoded,text/plain,text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
 
-    public static String convertResourceToString(String fileName) throws IOException {
-        InputStream fileStream = ResourceUtils.class.getClassLoader().getResourceAsStream(fileName);
-
-        java.util.Scanner s = new java.util.Scanner(fileStream).useDelimiter("\\A");
-        return s.hasNext() ? s.next() : "";
+    public static String convertResourceToString(String fileName) {
+        try {
+            InputStream fileStream = ResourceUtils.class.getClassLoader().getResourceAsStream(fileName);
+
+            java.util.Scanner s = new java.util.Scanner(fileStream).useDelimiter("\\A");
+            return s.hasNext() ? s.next() : "";
+        } catch (Exception exception) {
+            throw new NullPointerException("Can't find resource file " + fileName);
+        }
     }
 
     public static void assertJsonEquals(JSONObject expected, JSONObject actual) {
diff --git a/PrebidMobile/tests.gradle b/PrebidMobile/tests.gradle
index 83facf650..1d991e5e5 100644
--- a/PrebidMobile/tests.gradle
+++ b/PrebidMobile/tests.gradle
@@ -8,6 +8,10 @@ dependencies {
     testImplementation 'androidx.test:runner:1.4.0'
     testImplementation 'androidx.test:rules:1.4.0'
 
+    // JSON comparators
+    testImplementation "com.fasterxml.jackson.core:jackson-databind:2.14.3"
+    testImplementation "org.apache.camel:camel-json-patch:3.22.2"
+
     testImplementation libs.robolectric
     testImplementation libs.shadows.httpclient