The iPhone SDK does not allow dialing from an application. But you can do it using UITextField. Set the keyboard type toUIKeyboardTypePhonePad
textfield.keyboardType = UIKeyboardTypePhonePad;
textfield,
textfield.text = numberToDial;
,
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"tel://%@",textfield.text]]];