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customised outgoing and incming call screen

hey guys, I am trying to develop an app,where i am supposed to customise the android default phone outgoing & incoming screen.I have achieved it for incoming screen,using the broadcast receiver(catching unordered intent PHONE_STATE) and ITelephony hidden class.But i am failing to do so for outgoing call(NEW_OUTGOING_CALL),are there any hidden class/methods to make a call in android?.Any other ways to solve this issue ,?

Thanks in advance