Call a GSM Service #123*

Question

I want to call a GSM-Servicenumber of my provider, but the iPhone won\'t give a reaction. When I try the same with a regular number it works.

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Answer 1

it is not possible to use gsm-codes with public methods

See Apples Documentation about Phone Links:

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

Answer 2

Replace * with %2A and # with %23.

Your example would be:

[NSURL URLWithString:@"tel:%23123%2A1%2A4%23"]