diff --git a/telecomm/java/android/telecomm/Conference.java b/telecomm/java/android/telecomm/Conference.java
index 34b9dae7d83ad..44accb78fc5ee 100644
--- a/telecomm/java/android/telecomm/Conference.java
+++ b/telecomm/java/android/telecomm/Conference.java
@@ -163,6 +163,7 @@ public abstract class Conference {
      * @return True if the connection was successfully removed.
      */
     public void removeConnection(Connection connection) {
+        Log.d(this, "removing %s from %s", connection, mChildConnections);
         if (connection != null && mChildConnections.remove(connection)) {
             connection.resetConference();
             for (Listener l : mListeners) {
@@ -177,7 +178,7 @@ public abstract class Conference {
     public void destroy() {
         Log.d(this, "destroying conference : %s", this);
         // Tear down the children.
-        for (Connection connection : new ArrayList<>(mChildConnections)) {
+        for (Connection connection : mChildConnections) {
             Log.d(this, "removing connection %s", connection);
             removeConnection(connection);
         }
diff --git a/telecomm/java/android/telecomm/Connection.java b/telecomm/java/android/telecomm/Connection.java
index c307a25aa5fcf..3aa4bafaecd9a 100644
--- a/telecomm/java/android/telecomm/Connection.java
+++ b/telecomm/java/android/telecomm/Connection.java
@@ -914,10 +914,11 @@ public abstract class Connection {
      */
     public final boolean setConference(Conference conference) {
         // We check to see if it is already part of another conference.
-        if (mConference == null && mConnectionService != null &&
-                mConnectionService.containsConference(conference)) {
+        if (mConference == null) {
             mConference = conference;
-            fireConferenceChanged();
+            if (mConnectionService != null && mConnectionService.containsConference(conference)) {
+                fireConferenceChanged();
+            }
             return true;
         }
         return false;
@@ -929,6 +930,7 @@ public abstract class Connection {
      */
     public final void resetConference() {
         if (mConference != null) {
+            Log.d(this, "Conference reset");
             mConference = null;
             fireConferenceChanged();
         }
diff --git a/telecomm/java/android/telecomm/ConnectionService.java b/telecomm/java/android/telecomm/ConnectionService.java
index c80597808e372..b77bb18515505 100644
--- a/telecomm/java/android/telecomm/ConnectionService.java
+++ b/telecomm/java/android/telecomm/ConnectionService.java
@@ -84,6 +84,7 @@ public abstract class ConnectionService extends Service {
     private final ConnectionServiceAdapter mAdapter = new ConnectionServiceAdapter();
 
     private boolean mAreAccountsInitialized = false;
+    private Conference sNullConference;
 
     private final IBinder mBinder = new IConnectionService.Stub() {
         @Override
@@ -561,17 +562,29 @@ public abstract class ConnectionService extends Service {
 
     private void disconnect(String callId) {
         Log.d(this, "disconnect %s", callId);
-        findConnectionForAction(callId, "disconnect").onDisconnect();
+        if (mConnectionById.containsKey(callId)) {
+            findConnectionForAction(callId, "disconnect").onDisconnect();
+        } else {
+            findConferenceForAction(callId, "disconnect").onDisconnect();
+        }
     }
 
     private void hold(String callId) {
         Log.d(this, "hold %s", callId);
-        findConnectionForAction(callId, "hold").onHold();
+        if (mConnectionById.containsKey(callId)) {
+            findConnectionForAction(callId, "hold").onHold();
+        } else {
+            findConferenceForAction(callId, "hold").onHold();
+        }
     }
 
     private void unhold(String callId) {
         Log.d(this, "unhold %s", callId);
-        findConnectionForAction(callId, "unhold").onUnhold();
+        if (mConnectionById.containsKey(callId)) {
+            findConnectionForAction(callId, "unhold").onUnhold();
+        } else {
+            findConferenceForAction(callId, "unhold").onUnhold();
+        }
     }
 
     private void onAudioStateChanged(String callId, AudioState audioState) {
@@ -616,7 +629,10 @@ public abstract class ConnectionService extends Service {
             return;
         }
 
-        // TODO: Find existing conference call and invoke split(connection).
+        Conference conference = connection.getConference();
+        if (conference != null) {
+            conference.onSeparate(connection);
+        }
     }
 
     private void onPostDialContinue(String callId, boolean proceed) {
@@ -885,4 +901,19 @@ public abstract class ConnectionService extends Service {
         }
         return sNullConnection;
     }
+
+    private Conference findConferenceForAction(String conferenceId, String action) {
+        if (mConferenceById.containsKey(conferenceId)) {
+            return mConferenceById.get(conferenceId);
+        }
+        Log.w(this, "%s - Cannot find conference %s", action, conferenceId);
+        return getNullConference();
+    }
+
+    private Conference getNullConference() {
+        if (sNullConference == null) {
+            sNullConference = new Conference(null) {};
+        }
+        return sNullConference;
+    }
 }
diff --git a/telecomm/java/android/telecomm/ConnectionServiceAdapter.java b/telecomm/java/android/telecomm/ConnectionServiceAdapter.java
index 41c6360461bbd..cb6364660a687 100644
--- a/telecomm/java/android/telecomm/ConnectionServiceAdapter.java
+++ b/telecomm/java/android/telecomm/ConnectionServiceAdapter.java
@@ -197,6 +197,7 @@ final class ConnectionServiceAdapter implements DeathRecipient {
     void setIsConferenced(String callId, String conferenceCallId) {
         for (IConnectionServiceAdapter adapter : mAdapters) {
             try {
+                Log.d(this, "sending connection %s with conference %s", callId, conferenceCallId);
                 adapter.setIsConferenced(callId, conferenceCallId);
             } catch (RemoteException ignored) {
             }