diff --git a/testapps/TestRcsApp/TestApp/Android.bp b/testapps/TestRcsApp/TestApp/Android.bp
index 49feff8..e63715b 100644
--- a/testapps/TestRcsApp/TestApp/Android.bp
+++ b/testapps/TestRcsApp/TestApp/Android.bp
@@ -18,6 +18,7 @@
         "androidx-constraintlayout_constraintlayout",
         "aosp_test_rcs_client_base",
         "androidx.appcompat_appcompat",
+        "libphonenumber-platform"
     ],
     certificate: "platform",
 
diff --git a/testapps/TestRcsApp/TestApp/AndroidManifest.xml b/testapps/TestRcsApp/TestApp/AndroidManifest.xml
index d57ec94..8f2d6bd 100644
--- a/testapps/TestRcsApp/TestApp/AndroidManifest.xml
+++ b/testapps/TestRcsApp/TestApp/AndroidManifest.xml
@@ -19,8 +19,8 @@
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.sample.rcsclient"
-    android:versionCode="4"
-    android:versionName="1.0.3">
+    android:versionCode="5"
+    android:versionName="1.0.4">
 
     <uses-sdk
         android:minSdkVersion="30"
diff --git a/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/util/NumberUtils.java b/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/util/NumberUtils.java
index 72cbf3f..14d3b9c 100644
--- a/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/util/NumberUtils.java
+++ b/testapps/TestRcsApp/TestApp/src/com/google/android/sample/rcsclient/util/NumberUtils.java
@@ -17,8 +17,12 @@
 package com.google.android.sample.rcsclient.util;
 
 import android.content.Context;
-import android.telephony.PhoneNumberUtils;
 import android.telephony.TelephonyManager;
+import android.util.Log;
+
+import com.android.i18n.phonenumbers.NumberParseException;
+import com.android.i18n.phonenumbers.PhoneNumberUtil;
+import com.android.i18n.phonenumbers.Phonenumber;
 
 public class NumberUtils {
 
@@ -30,6 +34,13 @@
     public static String formatNumber(Context context, String number) {
         TelephonyManager manager = context.getSystemService(TelephonyManager.class);
         String simCountryIso = manager.getSimCountryIso().toUpperCase();
-        return PhoneNumberUtils.formatNumberToE164(number, simCountryIso);
+        PhoneNumberUtil util = PhoneNumberUtil.getInstance();
+        try {
+            Phonenumber.PhoneNumber phoneNumber = util.parse(number, simCountryIso);
+            return util.format(phoneNumber, PhoneNumberUtil.PhoneNumberFormat.E164);
+        } catch (NumberParseException e) {
+            Log.w("NumberUtils", "formatNumber: could not format " + number + ", error: " + e);
+        }
+        return null;
     }
 }