diff --git a/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java b/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java
index 930821cda..75ed379f2 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java
@@ -105,6 +105,8 @@ import java.net.SocketException;
 import java.net.SocketTimeoutException;
 import java.security.Security;
 import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.rxjava3.core.CompletableObserver;
@@ -164,7 +166,6 @@ public class ApplicationContext extends MultiDexApplication implements AppForegr
                             .addBlocking("app-dependencies", this::initializeAppDependencies)
                             .addBlocking("first-launch", this::initializeFirstEverAppLaunch)
                             .addBlocking("app-migrations", this::initializeApplicationMigrations)
-                            .addBlocking("ring-rtc", this::initializeRingRtc)
                             .addBlocking("mark-registration", () -> RegistrationUtil.maybeMarkRegistrationComplete(this))
                             .addBlocking("lifecycle-observer", () -> ApplicationDependencies.getAppForegroundObserver().addListener(this))
                             .addBlocking("message-retriever", this::initializeMessageRetrieval)
@@ -177,6 +178,7 @@ public class ApplicationContext extends MultiDexApplication implements AppForegr
                             })
                             .addBlocking("blob-provider", this::initializeBlobProvider)
                             .addBlocking("feature-flags", FeatureFlags::init)
+                            .addBlocking("ring-rtc", this::initializeRingRtc)
                             .addBlocking("glide", () -> SignalGlideModule.setRegisterGlideComponents(new SignalGlideComponents()))
                             .addNonBlocking(this::checkIsGooglePayReady)
                             .addNonBlocking(this::cleanAvatarStorage)
@@ -416,7 +418,11 @@ public class ApplicationContext extends MultiDexApplication implements AppForegr
 
   private void initializeRingRtc() {
     try {
-      CallManager.initialize(this, new RingRtcLogger(), Collections.emptyMap());
+      Map<String, String> fieldTrials = new HashMap<>();
+      if (FeatureFlags.callingFieldTrialAnyAddressPortsKillSwitch()) {
+        fieldTrials.put("RingRTC-AnyAddressPortsKillSwitch", "Enabled");
+      }
+      CallManager.initialize(this, new RingRtcLogger(), fieldTrials);
     } catch (UnsatisfiedLinkError e) {
       throw new AssertionError("Unable to load ringrtc library", e);
     }
diff --git a/app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java b/app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java
index b0e4e91e4..7aca3d065 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java
@@ -105,6 +105,7 @@ public final class FeatureFlags {
   private static final String PAYPAL_ONE_TIME_DONATIONS         = "android.oneTimePayPalDonations.2";
   private static final String PAYPAL_RECURRING_DONATIONS        = "android.recurringPayPalDonations.3";
   private static final String TEXT_FORMATTING                   = "android.textFormatting";
+  private static final String ANY_ADDRESS_PORTS_KILL_SWITCH     = "android.calling.fieldTrial.anyAddressPortsKillSwitch";
 
   /**
    * We will only store remote values for flags in this set. If you want a flag to be controllable
@@ -160,7 +161,8 @@ public final class FeatureFlags {
       CHAT_FILTERS,
       PAYPAL_ONE_TIME_DONATIONS,
       PAYPAL_RECURRING_DONATIONS,
-      TEXT_FORMATTING
+      TEXT_FORMATTING,
+      ANY_ADDRESS_PORTS_KILL_SWITCH
   );
 
   @VisibleForTesting
@@ -574,6 +576,13 @@ public final class FeatureFlags {
     return getBoolean(TEXT_FORMATTING, false);
   }
 
+  /**
+   * Enable/disable RingRTC field trial for "AnyAddressPortsKillSwitch"
+   */
+  public static boolean callingFieldTrialAnyAddressPortsKillSwitch() {
+    return getBoolean(ANY_ADDRESS_PORTS_KILL_SWITCH, false);
+  }
+
   /** Only for rendering debug info. */
   public static synchronized @NonNull Map<String, Object> getMemoryValues() {
     return new TreeMap<>(REMOTE_VALUES);