Even if my iPhone is unlocked but using any AT&T SIM like Straight Talk or Go Phone I still can't reach Settings -> General -> Network -> Cellular Data Network. To me this sounds like a software bug because you can't make the required APN and MMS settings like other unlocked phones can and like the iPhone can in say europe or canada. Is this an artifact of being restored but keeping the carrier settings I had when the phone was locked and/or on AT&T? I just got an unlock and haven't had a unlocked iPhone before, I have restored and gotten the message in iTunes. Will restore as new phone allow me to see Cellular Data Network you think? I researched and see a tmobile SIM swap trick and obviously there are jailbreak tweaks that can accomplish this too but I was getting the impression these are for locked phones.