Index: kernel/generic/src/ipc/ipc.c
===================================================================
--- kernel/generic/src/ipc/ipc.c	(revision df1cbb397b1a548067ce251bf1d5267217bbf6e9)
+++ kernel/generic/src/ipc/ipc.c	(revision 314f4b59687d394aa33a8c64a0f52470e5767db7)
@@ -440,6 +440,6 @@
 /** Disconnect phone from answerbox.
  *
- * This call leaves the phone in the HUNGUP state. The change to 'free' is done
- * lazily later.
+ * This call leaves the phone in the hung-up state. The phone is destroyed when
+ * its last active call is answered and there are no references to it.
  *
  * @param phone Phone structure to be hung up.
@@ -755,9 +755,4 @@
 
 	mutex_lock(&phone->lock);
-	if ((phone->state == IPC_PHONE_HUNGUP) &&
-	    (atomic_get(&phone->active_calls) == 0)) {
-		phone->state = IPC_PHONE_FREE;
-		phone->callee = NULL;
-	}
 
 	/*