canOpen and open methods of UIApplication returning different results for a FaceTime url

Question

I am using iPhone 4 running iOS 7.

[[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"facetime://phoneNumber"]];

returns YES .

but

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"facetime://phoneNumber"]];

returns NO .

I am not able to figure out what is the problem. In iPad it is working fine.

Answer 1

Thanks to Wain ! I checked FaceTime configuration on device, it was not enabled. I enabled it by going into Settings->General->Restrictions on iPhone 4(running iOS 7) and finally openURL returned YES and FaceTime call was initiated.

I wonder if there is some api which tells that if FaceTime is enabled or not?