How to make a call which begin with * in iPhone?

In my application, I want to call the number *111, when I use this U开发者_Go百科RL tel:*111 to call, but can't make call success, please give me some indicate, thank you very much.

[[UIApplication sharedApplication] openURL:@"tel:*111"] 

was not work. but it will work when remove *:

[[UIApplication sharedApplication] openURL:@"tel:111"];

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It's not possible. From the Apple URL Scheme Reference:

To prevent users from maliciously redirecting phone calls or changing the behavior of a phone or account, the Phone application supports most, but not all, of the special characters in the tel scheme. Specifically, if a URL contains the * or # characters, the Phone application does not attempt to dial the corresponding phone number.