Hello guys, for all of you who are wondering if the iPhone 5 AT&t is unlocked. I'm here to confirm from personal experience. I got my iPhone 5 earlier today. I asked to pay the full price hoping to find it unlocked like what happened with the iPhone 4s. anyhow, I took my T-mobile SIM and cut it to match the nano SIM size and walllla .. my iPhone was activated and working on T-mobile with 3G signal. here's a screenshot that i took from my iPhone to confirm ..