diff --git a/telephony/java/android/telephony/ims/ImsService.java b/telephony/java/android/telephony/ims/ImsService.java
index 406f01e82c353..f1f683c70735e 100644
--- a/telephony/java/android/telephony/ims/ImsService.java
+++ b/telephony/java/android/telephony/ims/ImsService.java
@@ -18,6 +18,7 @@ package android.telephony.ims;
 
 import android.app.PendingIntent;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.os.IBinder;
 import android.os.Message;
 import android.os.RemoteException;
@@ -43,6 +44,7 @@ import com.android.internal.annotations.VisibleForTesting;
 
 import static android.Manifest.permission.MODIFY_PHONE_STATE;
 import static android.Manifest.permission.READ_PHONE_STATE;
+import static android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE;
 
 /**
  * Main ImsService implementation, which binds via the Telephony ImsResolver. Services that extend
@@ -137,7 +139,7 @@ public abstract class ImsService extends ImsServiceBase {
         @Override
         public boolean isConnected(int slotId, int featureType, int callSessionType, int callType)
                 throws RemoteException {
-            enforceCallingOrSelfPermission(READ_PHONE_STATE, "isConnected");
+            enforceReadPhoneStatePermission("isConnected");
             synchronized (mFeatures) {
                 MMTelFeature feature = resolveMMTelFeature(slotId, featureType);
                 if (feature != null) {
@@ -149,7 +151,7 @@ public abstract class ImsService extends ImsServiceBase {
 
         @Override
         public boolean isOpened(int slotId, int featureType) throws RemoteException {
-            enforceCallingOrSelfPermission(READ_PHONE_STATE, "isOpened");
+            enforceReadPhoneStatePermission("isOpened");
             synchronized (mFeatures) {
                 MMTelFeature feature = resolveMMTelFeature(slotId, featureType);
                 if (feature != null) {
@@ -161,7 +163,7 @@ public abstract class ImsService extends ImsServiceBase {
 
         @Override
         public int getFeatureStatus(int slotId, int featureType) throws RemoteException {
-            enforceCallingOrSelfPermission(READ_PHONE_STATE, "getFeatureStatus");
+            enforceReadPhoneStatePermission("getFeatureStatus");
             int status = ImsFeature.STATE_NOT_AVAILABLE;
             synchronized (mFeatures) {
                 SparseArray<ImsFeature> featureMap = mFeatures.get(slotId);
@@ -178,7 +180,7 @@ public abstract class ImsService extends ImsServiceBase {
         @Override
         public void addRegistrationListener(int slotId, int featureType,
                 IImsRegistrationListener listener) throws RemoteException {
-            enforceCallingOrSelfPermission(READ_PHONE_STATE, "addRegistrationListener");
+            enforceReadPhoneStatePermission("addRegistrationListener");
             synchronized (mFeatures) {
                 MMTelFeature feature = resolveMMTelFeature(slotId, featureType);
                 if (feature != null) {
@@ -190,7 +192,7 @@ public abstract class ImsService extends ImsServiceBase {
         @Override
         public void removeRegistrationListener(int slotId, int featureType,
                 IImsRegistrationListener listener) throws RemoteException {
-            enforceCallingOrSelfPermission(READ_PHONE_STATE, "removeRegistrationListener");
+            enforceReadPhoneStatePermission("removeRegistrationListener");
             synchronized (mFeatures) {
                 MMTelFeature feature = resolveMMTelFeature(slotId, featureType);
                 if (feature != null) {
@@ -351,6 +353,8 @@ public abstract class ImsService extends ImsServiceBase {
         }
         ImsFeature f = makeImsFeature(slotId, featureType);
         if (f != null) {
+            f.setContext(this);
+            f.setSlotId(slotId);
             f.setImsFeatureStatusCallback(c);
             featureMap.put(featureType, f);
         }
@@ -433,6 +437,17 @@ public abstract class ImsService extends ImsServiceBase {
         return null;
     }
 
+    /**
+     * Check for both READ_PHONE_STATE and READ_PRIVILEGED_PHONE_STATE. READ_PHONE_STATE is a
+     * public permission and READ_PRIVILEGED_PHONE_STATE is only granted to system apps.
+     */
+    private void enforceReadPhoneStatePermission(String fn) {
+        if (checkCallingOrSelfPermission(READ_PRIVILEGED_PHONE_STATE)
+                != PackageManager.PERMISSION_GRANTED) {
+            enforceCallingOrSelfPermission(READ_PHONE_STATE, fn);
+        }
+    }
+
     /**
      * @return An implementation of MMTelFeature that will be used by the system for MMTel
      * functionality. Must be able to handle emergency calls at any time as well.
diff --git a/telephony/java/android/telephony/ims/feature/ImsFeature.java b/telephony/java/android/telephony/ims/feature/ImsFeature.java
index 8d7d260104e28..988dd588ecad7 100644
--- a/telephony/java/android/telephony/ims/feature/ImsFeature.java
+++ b/telephony/java/android/telephony/ims/feature/ImsFeature.java
@@ -17,7 +17,10 @@
 package android.telephony.ims.feature;
 
 import android.annotation.IntDef;
+import android.content.Context;
+import android.content.Intent;
 import android.os.RemoteException;
+import android.telephony.SubscriptionManager;
 import android.util.Log;
 
 import com.android.ims.internal.IImsFeatureStatusCallback;
@@ -35,6 +38,32 @@ public abstract class ImsFeature {
 
     private static final String LOG_TAG = "ImsFeature";
 
+    /**
+     * Action to broadcast when ImsService is up.
+     * Internal use only.
+     * Only defined here separately compatibility purposes with the old ImsService.
+     * @hide
+     */
+    public static final String ACTION_IMS_SERVICE_UP =
+            "com.android.ims.IMS_SERVICE_UP";
+
+    /**
+     * Action to broadcast when ImsService is down.
+     * Internal use only.
+     * Only defined here separately for compatibility purposes with the old ImsService.
+     * @hide
+     */
+    public static final String ACTION_IMS_SERVICE_DOWN =
+            "com.android.ims.IMS_SERVICE_DOWN";
+
+    /**
+     * Part of the ACTION_IMS_SERVICE_UP or _DOWN intents.
+     * A long value; the phone ID corresponding to the IMS service coming up or down.
+     * Only defined here separately for compatibility purposes with the old ImsService.
+     * @hide
+     */
+    public static final String EXTRA_PHONE_ID = "android:phone_id";
+
     // Invalid feature value
     public static final int INVALID = -1;
     // ImsFeatures that are defined in the Manifests. Ensure that these values match the previously
@@ -61,11 +90,21 @@ public abstract class ImsFeature {
     private List<INotifyFeatureRemoved> mRemovedListeners = new ArrayList<>();
     private IImsFeatureStatusCallback mStatusCallback;
     private @ImsState int mState = STATE_NOT_AVAILABLE;
+    private int mSlotId = SubscriptionManager.INVALID_SIM_SLOT_INDEX;
+    private Context mContext;
 
     public interface INotifyFeatureRemoved {
         void onFeatureRemoved(int slotId);
     }
 
+    public void setContext(Context context) {
+        mContext = context;
+    }
+
+    public void setSlotId(int slotId) {
+        mSlotId = slotId;
+    }
+
     public void addFeatureRemovedListener(INotifyFeatureRemoved listener) {
         synchronized (mRemovedListeners) {
             mRemovedListeners.add(listener);
@@ -118,6 +157,30 @@ public abstract class ImsFeature {
                 Log.w(LOG_TAG, "Couldn't notify feature state: " + e.getMessage());
             }
         }
+        sendImsServiceIntent(state);
+    }
+
+    /**
+     * Provide backwards compatibility using deprecated service UP/DOWN intents.
+     */
+    private void sendImsServiceIntent(@ImsState int state) {
+        if(mContext == null || mSlotId == SubscriptionManager.INVALID_SIM_SLOT_INDEX) {
+            return;
+        }
+        Intent intent;
+        switch (state) {
+            case ImsFeature.STATE_NOT_AVAILABLE:
+            case ImsFeature.STATE_INITIALIZING:
+                intent = new Intent(ACTION_IMS_SERVICE_DOWN);
+                break;
+            case ImsFeature.STATE_READY:
+                intent = new Intent(ACTION_IMS_SERVICE_UP);
+                break;
+            default:
+                intent = new Intent(ACTION_IMS_SERVICE_DOWN);
+        }
+        intent.putExtra(EXTRA_PHONE_ID, mSlotId);
+        mContext.sendBroadcast(intent);
     }
 
     /**