diff --git a/App.tsx b/App.tsx
index f59b24ab..4e3d18d2 100644
--- a/App.tsx
+++ b/App.tsx
@@ -38,7 +38,7 @@ import ErrorBoundary from './src/common/ErrorBoundary';
 import { getPermissionsToRequest } from '@utils/PermissionUtils';
 import ScreenshotBlocker from './src/components/utlis/ScreenshotBlocker';
 import { setItem } from './src/components/utlis/storageHelper';
-import { ENV } from './src/constants/config';
+import { COSMOS_DIALER_PACKAGE_NAME, ENV } from './src/constants/config';
 import AuthRouter from './src/screens/auth/AuthRouter';
 import { type TDocumentObj } from '@screens/caseDetails/interface';
 import Permissions from './src/screens/permissions/Permissions';
@@ -50,6 +50,7 @@ import CodePushLoadingModal, { CodePushLoadingModalRef } from './CodePushModal';
 import { initSentry } from '@components/utlis/sentry';
 import { AppStates } from '@interfaces/appStates';
 import syncSelfCallData from '@services/syncSelfCallData';
+import { getDefaultCallingApp } from '@components/utlis/callModuleUtils';
 
 if (!__DEV__) {
   initSentry();
@@ -97,6 +98,9 @@ function App() {
 
   const askForPermissions = async () => {
     const permissionsToRequest = await getPermissionsToRequest();
+    const defaultCallingApp = await getDefaultCallingApp() === COSMOS_DIALER_PACKAGE_NAME;
+
+    console.log('Default calling app:', defaultCallingApp);
     if (Platform.OS === 'android') {
       PermissionsAndroid.requestMultiple(permissionsToRequest)
         .then(async (result) => {
@@ -107,7 +111,7 @@ function App() {
               break;
             }
           }
-          setPermissions(isAllPermissionsGranted);
+          setPermissions(isAllPermissionsGranted && defaultCallingApp);
         })
         .catch((err) => {
           setPermissions(false);
diff --git a/android/app/src/main/java/com/avapp/callModule/CallModule.java b/android/app/src/main/java/com/avapp/callModule/CallModule.java
index 3ceaf1d5..ff600379 100644
--- a/android/app/src/main/java/com/avapp/callModule/CallModule.java
+++ b/android/app/src/main/java/com/avapp/callModule/CallModule.java
@@ -3,6 +3,7 @@ package com.avapp.callModule;
 import android.app.Activity;
 import android.content.Intent;
 import android.net.Uri;
+import android.telecom.TelecomManager;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -161,6 +162,28 @@ public class CallModule extends ReactContextBaseJavaModule {
         makeCall(activity, recipient, exotelNumber);
     }
 
+    @ReactMethod
+    public void getDefaultCallingApp(Promise promise) {
+        try {
+            TelecomManager telecomManager = (TelecomManager) reactContext.getSystemService(Context.TELECOM_SERVICE);
+            if (telecomManager != null) {
+                String defaultDialer = telecomManager.getDefaultDialerPackage();
+                if (defaultDialer != null) {
+                    Log.d(TAG, "Default calling app: " + defaultDialer);
+                    promise.resolve(defaultDialer); // Send default dialer package name to JS side
+                } else {
+                    Log.d(TAG, "No default calling app found.");
+                    promise.resolve(null); // No default dialer app
+                }
+            } else {
+                promise.reject("ERROR", "TelecomManager is not available.");
+            }
+        } catch (Exception e) {
+            Log.e(TAG, "Error retrieving default calling app", e);
+            promise.reject("ERROR", e);
+        }
+    }
+
     private void makeCall(Activity activity, String recipient, String exotelNumber) {
         Intent intent = new Intent(Intent.ACTION_CALL);
         intent.setData(Uri.parse("tel:" + pendingRecipient));
diff --git a/config/dev/config.js b/config/dev/config.js
index 44c6f829..4a455082 100644
--- a/config/dev/config.js
+++ b/config/dev/config.js
@@ -8,4 +8,5 @@ export const APM_APP_NAME = 'cosmos-app';
 export const APM_BASE_URL = 'https://dev-longhorn-portal.np.navi-tech.in/apm-events';
 export const GOOGLE_SSO_CLIENT_ID =
   '60755663443-40k0fbrbbqv4ci4hrjlbrphab5fj387b.apps.googleusercontent.com';
-export const MS_CLARITY_PROJECT_ID = '';
\ No newline at end of file
+export const MS_CLARITY_PROJECT_ID = '';
+export const COSMOS_DIALER_PACKAGE_NAME = 'org.fossify.phone';
diff --git a/config/prod/config.js b/config/prod/config.js
index f11fe362..9e643662 100644
--- a/config/prod/config.js
+++ b/config/prod/config.js
@@ -12,4 +12,5 @@ export const IS_DATA_SYNC_REQUIRED = true;
 export const DATA_SYNC_TIME_INTERVAL = 2 * MINUTES_IN_AN_HOUR * MILLISECONDS_IN_A_MINUTE; // 2hr
 export const GOOGLE_SSO_CLIENT_ID =
   '136591056725-ev8db4hrlud2m23n0o03or3cmmp3a3cq.apps.googleusercontent.com';
-export const MS_CLARITY_PROJECT_ID = 'n2nsbu7o78';
\ No newline at end of file
+export const MS_CLARITY_PROJECT_ID = 'n2nsbu7o78';
+export const COSMOS_DIALER_PACKAGE_NAME = 'org.fossify.phone';
\ No newline at end of file
diff --git a/config/qa/config.js b/config/qa/config.js
index e195646f..62afaf32 100644
--- a/config/qa/config.js
+++ b/config/qa/config.js
@@ -13,3 +13,5 @@ export const DATA_SYNC_TIME_INTERVAL = 2 * MINUTES_IN_AN_HOUR * MILLISECONDS_IN_
 export const GOOGLE_SSO_CLIENT_ID =
     '60755663443-40k0fbrbbqv4ci4hrjlbrphab5fj387b.apps.googleusercontent.com';
 export const MS_CLARITY_PROJECT_ID = '';
+export const COSMOS_DIALER_PACKAGE_NAME = 'org.fossify.phone';
+
diff --git a/src/components/utlis/callModuleUtils.ts b/src/components/utlis/callModuleUtils.ts
index 5d1b7c16..b7b9bf33 100644
--- a/src/components/utlis/callModuleUtils.ts
+++ b/src/components/utlis/callModuleUtils.ts
@@ -8,3 +8,7 @@ export const launchCallIntent = (number: string, exotelnumber: string, filePatch
 export const isDialerAppValidApk = (filePath: string): Promise<boolean> => {
   return CallModule.isDialerAppValidApkFile(filePath);
 }
+
+export const getDefaultCallingApp = (): Promise<string> => {
+  return CallModule.getDefaultCallingApp();
+}
diff --git a/src/constants/config.js b/src/constants/config.js
index e195646f..1381cea2 100644
--- a/src/constants/config.js
+++ b/src/constants/config.js
@@ -13,3 +13,4 @@ export const DATA_SYNC_TIME_INTERVAL = 2 * MINUTES_IN_AN_HOUR * MILLISECONDS_IN_
 export const GOOGLE_SSO_CLIENT_ID =
     '60755663443-40k0fbrbbqv4ci4hrjlbrphab5fj387b.apps.googleusercontent.com';
 export const MS_CLARITY_PROJECT_ID = '';
+export const COSMOS_DIALER_PACKAGE_NAME = 'org.fossify.phone';