Since upgrading to iOS 6, I am unable to block my cell phone number, unless I use *67 before each call. Before, I would go to Settings > Phone > Show my phone number > Off. I cannot do that now. Any suggestions? Is there another way? Thanks.
Your carrier might be able to do it for you. Do you have AT&T? I think I recall that GSM phones had this option before, but CDMA phones did not. Verizon had to set it up on their end.