diff --git a/src/com/android/settings/network/telephony/MobileNetworkUtils.java b/src/com/android/settings/network/telephony/MobileNetworkUtils.java
index 939598b5ec3..9b25338acea 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkUtils.java
+++ b/src/com/android/settings/network/telephony/MobileNetworkUtils.java
@@ -80,12 +80,16 @@ public class MobileNetworkUtils {
     }
 
     /**
-     * Returns true if Wifi calling is enabled for at least one phone.
+     * Returns true if Wifi calling is enabled for at least one subscription.
      */
     public static boolean isWifiCallingEnabled(Context context) {
-        int phoneCount = context.getSystemService(TelephonyManager.class).getPhoneCount();
-        for (int i = 0; i < phoneCount; i++) {
-            if (isWifiCallingEnabled(context, i)) {
+        SubscriptionManager subManager = context.getSystemService(SubscriptionManager.class);
+        if (subManager == null) {
+            Log.e(TAG, "isWifiCallingEnabled: couldn't get system service.");
+            return false;
+        }
+        for (int subId : subManager.getActiveSubscriptionIdList()) {
+            if (isWifiCallingEnabled(context, subId)) {
                 return true;
             }
         }
@@ -93,11 +97,12 @@ public class MobileNetworkUtils {
     }
 
     /**
-     * Returns true if Wifi calling is enabled for the specific phone with id {@code phoneId}.
+     * Returns true if Wifi calling is enabled for the specific subscription with id {@code subId}.
      */
-    public static boolean isWifiCallingEnabled(Context context, int phoneId) {
+    public static boolean isWifiCallingEnabled(Context context, int subId) {
         final PhoneAccountHandle simCallManager =
-                TelecomManager.from(context).getSimCallManager();
+                TelecomManager.from(context).getSimCallManagerForSubscription(subId);
+        final int phoneId = SubscriptionManager.getSlotIndex(subId);
 
         boolean isWifiCallingEnabled;
         if (simCallManager != null) {
diff --git a/src/com/android/settings/network/telephony/VideoCallingPreferenceController.java b/src/com/android/settings/network/telephony/VideoCallingPreferenceController.java
index 8c32df0ee12..1c788638151 100644
--- a/src/com/android/settings/network/telephony/VideoCallingPreferenceController.java
+++ b/src/com/android/settings/network/telephony/VideoCallingPreferenceController.java
@@ -63,8 +63,7 @@ public class VideoCallingPreferenceController extends TelephonyTogglePreferenceC
     @Override
     public int getAvailabilityStatus(int subId) {
         return subId != SubscriptionManager.INVALID_SUBSCRIPTION_ID
-                && MobileNetworkUtils.isWifiCallingEnabled(mContext,
-                SubscriptionManager.getPhoneId(subId))
+                && MobileNetworkUtils.isWifiCallingEnabled(mContext, subId)
                 && isVideoCallEnabled(subId)
                 ? AVAILABLE
                 : CONDITIONALLY_UNAVAILABLE;
diff --git a/src/com/android/settings/network/telephony/WifiCallingPreferenceController.java b/src/com/android/settings/network/telephony/WifiCallingPreferenceController.java
index 946f7416fed..c71ee3536b2 100644
--- a/src/com/android/settings/network/telephony/WifiCallingPreferenceController.java
+++ b/src/com/android/settings/network/telephony/WifiCallingPreferenceController.java
@@ -68,7 +68,6 @@ public class WifiCallingPreferenceController extends TelephonyBasePreferenceCont
         super(context, key);
         mCarrierConfigManager = context.getSystemService(CarrierConfigManager.class);
         mTelephonyManager = context.getSystemService(TelephonyManager.class);
-        mSimCallManager = context.getSystemService(TelecomManager.class).getSimCallManager();
         mPhoneStateListener = new PhoneCallStateListener(Looper.getMainLooper());
         mEditableWfcRoamingMode = true;
         mUseWfcHomeModeForRoaming = false;
@@ -77,8 +76,7 @@ public class WifiCallingPreferenceController extends TelephonyBasePreferenceCont
     @Override
     public int getAvailabilityStatus(int subId) {
         return subId != SubscriptionManager.INVALID_SUBSCRIPTION_ID
-                && MobileNetworkUtils.isWifiCallingEnabled(mContext,
-                SubscriptionManager.getPhoneId(subId))
+                && MobileNetworkUtils.isWifiCallingEnabled(mContext, subId)
                 ? AVAILABLE
                 : UNSUPPORTED_ON_DEVICE;
     }
@@ -155,6 +153,8 @@ public class WifiCallingPreferenceController extends TelephonyBasePreferenceCont
         mSubId = subId;
         mTelephonyManager = TelephonyManager.from(mContext).createForSubscriptionId(mSubId);
         mImsManager = ImsManager.getInstance(mContext, SubscriptionManager.getPhoneId(mSubId));
+        mSimCallManager = mContext.getSystemService(TelecomManager.class)
+                .getSimCallManagerForSubscription(mSubId);
         if (mCarrierConfigManager != null) {
             final PersistableBundle carrierConfig = mCarrierConfigManager.getConfigForSubId(mSubId);
             if (carrierConfig != null) {