diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index f27796e08ab29..3bd6578f337e7 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -2101,13 +2101,13 @@ public class SubscriptionManager {
     /** @hide */
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     public static boolean isValidSlotIndex(int slotIndex) {
-        return slotIndex >= 0 && slotIndex < TelephonyManager.getDefault().getSupportedModemCount();
+        return slotIndex >= 0 && slotIndex < TelephonyManager.getDefault().getActiveModemCount();
     }
 
     /** @hide */
     @UnsupportedAppUsage
     public static boolean isValidPhoneId(int phoneId) {
-        return phoneId >= 0 && phoneId < TelephonyManager.getDefault().getSupportedModemCount();
+        return phoneId >= 0 && phoneId < TelephonyManager.getDefault().getActiveModemCount();
     }
 
     /** @hide */