From 6f68acb0f57775cbfee02ce390b9fcd4ecf513a8 Mon Sep 17 00:00:00 2001
From: Nazanin Bakhshi <nazaninb@google.com>
Date: Fri, 1 Mar 2019 11:54:41 -0800
Subject: [PATCH] disallow changing from multi-sim to single-sim for carrier
 apps

Bug: 125122645
Test: build
Change-Id: Ie422577e1f710b033ed85caed9a3e864aadff061
Merged-In: Ie422577e1f710b033ed85caed9a3e864aadff061
(cherry picked from commit 36ede9a2e66a83464590e8998ebdd4bc6feaf240)
---
 telephony/java/android/telephony/TelephonyManager.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 769d1a4e8bc71..3db7218663c18 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -10300,6 +10300,10 @@ public class TelephonyManager {
      * <p>Requires Permission:
      * {@link android.Manifest.permission#MODIFY_PHONE_STATE MODIFY_PHONE_STATE} or that the
      * calling app has carrier privileges (see {@link #hasCarrierPrivileges}).
+     *
+     * Note: with only carrier privileges, it is not allowed to switch from multi-sim
+     * to single-sim
+     *
      * @param numOfSims number of live SIMs we want to switch to
      * @throws android.os.RemoteException
      */