diff --git a/src/com/android/services/telephony/TelecomAccountRegistry.java b/src/com/android/services/telephony/TelecomAccountRegistry.java
index 37c5d7c..9cc7eb3 100644
--- a/src/com/android/services/telephony/TelecomAccountRegistry.java
+++ b/src/com/android/services/telephony/TelecomAccountRegistry.java
@@ -316,6 +316,8 @@
                     && isImsVoiceAvailable()) {
                 capabilities |= PhoneAccount.CAPABILITY_RTT;
                 mIsRttCapable = true;
+            } else {
+                mIsRttCapable = false;
             }
 
             extras.putBoolean(PhoneAccount.EXTRA_SUPPORTS_VIDEO_CALLING_FALLBACK,
diff --git a/testapps/TelephonyRegistryTestApp/AndroidManifest.xml b/testapps/TelephonyRegistryTestApp/AndroidManifest.xml
index 708ea66..1cfd3ba 100644
--- a/testapps/TelephonyRegistryTestApp/AndroidManifest.xml
+++ b/testapps/TelephonyRegistryTestApp/AndroidManifest.xml
@@ -19,6 +19,7 @@
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
     <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
     <uses-permission android:name="android.permission.READ_PRIVILEGED_PHONE_STATE"/>
+    <uses-permission android:name="android.permission.READ_PRECISE_PHONE_STATE"/>
     <application android:label="TelephonyRegistryTestApp">
         <activity
             android:name=".TelephonyRegistryTestApp"