[G3 Original Android Development] frankforpresident:
Ok, I will try to do that :) Thanks for the quick reply!

In the mean while.. I just used logcat for checking what goes wrong and this popped up:

05-17 22:19:48.182 1043 1043 D AndroidRuntime: Shutting down VM

05-17 22:19:48.183 1043 1043 E AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: main

05-17 22:19:48.183 1043 1043 E AndroidRuntime: java.lang.RuntimeException: Unable to start receiver com.android.server.telecom.components.PrimaryCallReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at android.app.ActivityThread.handleReceiver(ActivityThread.java:2766)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at android.app.ActivityThread.-wrap14(ActivityThread.java)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1440)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at android.os.Handler.dispatchMessage(Handler.java:102)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at android.os.Looper.loop(Looper.java:148)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.SystemServer.run(SystemServer.java:300)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.SystemServer.main(SystemServer.java:172)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at java.lang.reflect.Method.invoke(Native Method)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

05-17 22:19:48.183 1043 1043 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:772)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at java.util.concurrent.ConcurrentHashMap.containsKey(ConcurrentHashMap.java:800)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.InCallController.bindToInCallService(InCallController.java:426)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.InCallController.bindToServices(InCallController.java:404)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.InCallController.onCallAdded(InCallController.java:176)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.CallsManager.addCall(CallsManager.java:1588)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.CallsManager.startOutgoingCall(CallsManager.java:792)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.CallIntentProcessor.processOutgoingCallIntent(CallIntentProcessor.java:147)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.CallIntentProcessor.processIntent(CallIntentProcessor.java:56)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at com.android.server.telecom.components.PrimaryCallReceiver.onReceive(PrimaryCallReceiver.java:20)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	at android.app.ActivityThread.handleReceiver(ActivityThread.java:2759)

05-17 22:19:48.183 1043 1043 E AndroidRuntime:	... 9 more