diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 962200b82a81b..5a94a8a0ab52a 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -15100,6 +15100,11 @@ public class TelephonyManager {
      */
     public void registerTelephonyCallback(@NonNull @CallbackExecutor Executor executor,
             @NonNull TelephonyCallback callback) {
+
+        if (mContext == null) {
+            throw new IllegalStateException("telephony service is null.");
+        }
+
         if (executor == null || callback == null) {
             throw new IllegalArgumentException("TelephonyCallback and executor must be non-null");
         }