ios - How to hide phone number when calling

Question

My app allows the user to make a phone call but I need to hide the number I'm calling to because it has a secret code within it. Is there any way to achieve this?

When I say "hide the number", I mean the phone number that appears in the the confirmation UIAlertView before calling and, if possible, in navigation bar when the call is in process.

Answer 1

Most definitely not. The phone number that gets passed to the OS when making the call cannot be modified or hidden from the user. (What if your app dialed 911?)

Also, how is a "secret code" passed via a telephone number?