Bit like scream where he uses a voice changer and makes a call. Cool to make silly calls with stupid voices but does it break sdk rules? or are there any apps for this already?
I looked into this and found that when the phone call is active the Phone app 'locks' the microphone so that your application cannot record from it. There may be a loophole that I didn't find though...
it possible but you have to jailbreak, it call spoofapp3g in cydia. it's voip you can record call, change voice, change your caller id #