diff --git a/api/current.txt b/api/current.txt
index 9d909934ca9ca..923c376417de4 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -48286,6 +48286,7 @@ package android.telephony {
     field public static final int DATA_DISCONNECTING = 4; // 0x4
     field public static final int DATA_SUSPENDED = 3; // 0x3
     field public static final int DATA_UNKNOWN = -1; // 0xffffffff
+    field public static final String EXTRA_ACTIVE_SIM_SUPPORTED_COUNT = "android.telephony.extra.ACTIVE_SIM_SUPPORTED_COUNT";
     field public static final String EXTRA_CALL_VOICEMAIL_INTENT = "android.telephony.extra.CALL_VOICEMAIL_INTENT";
     field public static final String EXTRA_CARRIER_ID = "android.telephony.extra.CARRIER_ID";
     field public static final String EXTRA_CARRIER_NAME = "android.telephony.extra.CARRIER_NAME";
@@ -48295,7 +48296,6 @@ package android.telephony {
     field public static final String EXTRA_LAUNCH_VOICEMAIL_SETTINGS_INTENT = "android.telephony.extra.LAUNCH_VOICEMAIL_SETTINGS_INTENT";
     field public static final String EXTRA_NETWORK_COUNTRY = "android.telephony.extra.NETWORK_COUNTRY";
     field public static final String EXTRA_NOTIFICATION_COUNT = "android.telephony.extra.NOTIFICATION_COUNT";
-    field public static final String EXTRA_NUM_OF_ACTIVE_SIM_SUPPORTED = "android.telephony.extra.NUM_OF_ACTIVE_SIM_SUPPORTED";
     field public static final String EXTRA_PHONE_ACCOUNT_HANDLE = "android.telephony.extra.PHONE_ACCOUNT_HANDLE";
     field public static final String EXTRA_SPECIFIC_CARRIER_ID = "android.telephony.extra.SPECIFIC_CARRIER_ID";
     field public static final String EXTRA_SPECIFIC_CARRIER_NAME = "android.telephony.extra.SPECIFIC_CARRIER_NAME";
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 00fd99c392f14..10180ff995f0b 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -1057,7 +1057,7 @@ public class TelephonyManager {
      * or that all steps during multi-SIM change are done. To know those information you still need
      * to listen to SIM_STATE changes or active subscription changes.
      *
-     * See extra of {@link #EXTRA_NUM_OF_ACTIVE_SIM_SUPPORTED} for updated value.
+     * See extra of {@link #EXTRA_ACTIVE_SIM_SUPPORTED_COUNT} for updated value.
      */
     public static final String ACTION_MULTI_SIM_CONFIG_CHANGED =
             "android.telephony.action.MULTI_SIM_CONFIG_CHANGED";
@@ -1067,6 +1067,8 @@ public class TelephonyManager {
      * The number of active SIM supported by current multi-SIM config. It's not related to how many
      * SIM/subscriptions are currently active.
      *
+     * Same value will be returned by {@link #getActiveModemCount()}.
+     *
      * For single SIM mode, it's 1.
      * For DSDS or DSDA mode, it's 2.
      * For triple-SIM mode, it's 3.
@@ -1075,8 +1077,8 @@ public class TelephonyManager {
      *
      * type: integer
      */
-    public static final String EXTRA_NUM_OF_ACTIVE_SIM_SUPPORTED =
-            "android.telephony.extra.NUM_OF_ACTIVE_SIM_SUPPORTED";
+    public static final String EXTRA_ACTIVE_SIM_SUPPORTED_COUNT =
+            "android.telephony.extra.ACTIVE_SIM_SUPPORTED_COUNT";
 
     /**
      * @hide