How do I access the Cellular Data Network on an officially At&T locked Iphone?
My 4S was officially unlocked by AT&T, however, when I go to Settings>General>Network Menu I do NOT have the option of selecting the Cellular Data Settings menu to change my settings to my current carrier. I've been told that it is not 'totally unlocked' and that I have to jail break it. I do NOT want to jail brake my phone. Is there another way to open this option? I currently am able to make and receive calls with my other carrier but do not have MMS or Data capabilities even though I'm paying for it.
iPhone 4S, iOS 5.1.1