A Fake call that doesnt ring

Outgoing calls work well enough although the fake ring is odd. Its easy enough to fake an outgoing call without this app so theres real no purpose here.
Incoming calls on iPhone 5, iOS 7 just vibrate. There is no audible ringer. It silly to have a choice of ringers when theres no sound. Countdown timer seems to be fixed to about 10 seconds regardless of time frame chosen.
App should really close when calls are ended, not fade to black.
Please fix the timer and sound issues. Otherwise the app is kind of pointless.
If your using iOS 7 this app looks like previous iOSs. Anyone who knows your phone will know its fake.
Please update app to give a choice of iOS looks.
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Kplan23 about Fake Call Pro !!