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With this application you can:

.answer calls with the Home button

.reject Calls with the Back key

You can use this App even if your device already has the built-in option to answer calls with the Home button; this App has the added ability to reject the call using the back key.

Advanced PRO Functions:

. no Wait Message when phone is ringing

. option to don't show Pop-up message

This app is clearly not compatible with all devices: I personally tested and works with Samsung Galaxy S S2 and Notes II (stock Samsung).

Before purchasing the PRO version try the free to check if it is compatible with your device.