Let me be a bit more specific. I purchased 2 iPhone 6S's from Apple to be used on AT&T. They were upgrades from my iPhone 6. I paid for them outright. They came with an AT&T sim and I activated them on AT&T on my previous phone number. Over the weekend I was doing a restore on one of the phones to fix a possible software issue. When I plugged the phone into iTunes and erased the phone, the screen "Your phone has been unlocked" appeared. So, does this mean when you purchase the phone and do not use any payment system (like AT&T's Next) you get the phone unlocked?