What’s the correct URL for placing a call on an iPhone?

Question

Is the code for calling on the iPhone automatically

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel:11111111111"]]);

Answer 1

Your second line is fine and will work.

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://1111111111"]]);

Answer 2

From trying on an iPhone, tel://123456789 is the way to go. The tel:123456789 option is not even recognized, at least by the Safari URL bar.