objective c - How to call two digital phone number from the iphone App -

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i try call 2 digital phone number app using schema:

nsstring *strphone = [nsstring stringwithformat:@"tel:12"]; nsurl *phonenumberurl = [nsurl urlwithstring:strphone]; [[uiapplication sharedapplication] openurl:phonenumberurl];

but nothing happens. if use 3 digital number or more - works fine. know why so? apple's restriction?


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