diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 8d946f5..a09c6ad 100755
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -6214,7 +6214,11 @@
         TelephonyPermissions.enforceCallingOrSelfModifyPermissionOrCarrierPrivilege(
                 mApp, subId, "setAllowedNetworkTypesForReason");
         if (!TelephonyManager.isValidAllowedNetworkTypesReason(reason)) {
-            Rlog.e(LOG_TAG, "Invalid allowed network type reason: " + reason);
+            loge("setAllowedNetworkTypesForReason: Invalid allowed network type reason: " + reason);
+            return false;
+        }
+        if (!SubscriptionManager.isUsableSubscriptionId(subId)) {
+            loge("setAllowedNetworkTypesForReason: Invalid subscriptionId:" + subId);
             return false;
         }