Now we do a little example of how do make call into your app we need only one line of code for this feature
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithString:@"tel://55555555"];
OK, it's simple, but.... We need to do a verify if the user wants to make the call ok, let's change a code First step create a IBAction with a UIAlertView to verify user decision
         UIAlertView *msg = [[UIAlertView alloc] initWithTitle:@"Aviso" message:[NSString stringWithFormat:@"You really want to make a call to
 %@", phoneNumber.text] delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Call", nil];
	[msg show];
	[msg release];
And finally, verify a user decision and make a call
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
	if (buttonIndex == 1) {
		[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"tel://%@",phoneNumber.text]]];
		[super alertView:alertView clickedButtonAtIndex:buttonIndex];
Yeah, we made a click to call feature :) For this hint is all up to the next Thanks