Know if it's a private call

Mar 20, 2012 at 1:33 PM
Edited Mar 20, 2012 at 2:24 PM


I'm trying to build a call monitor and I want to know when a incoming call is in private or not.

And I can't use callerid because sometime new call seems to have this field empty even if it's a non private call.

So is there a way to know that ?