....a 32gb one. I had paid full price for the AT&T model to be able to unlock it for use on T-Mobile. Anyway the girl brings out one of the new unlocked iPhone 5's and I pay her the $106 difference and go on my way. I go immediately to the T-Mobile store in the mall just to see if they have the new Nexus 4 in to play around with. They don't so I just stand around and talk to one of the sales reps for a little while. I noticed the Apple employee who made the exchange for me running frantically past the T-Mobile store. She saw me, came in and said that I had not given her the 16gb iPhone 5 that I exchanged for the 32gb one. True enough, it was still in my pocket. I had given it to her when we first started the exchange but she had given it back to me to go into the back and I had just naturally put it back in my pocket and forgot about it. We completed the transaction and I was on my way with both phones. I then erased all my info on the phone and took the sim card and gave her the phone. Just for curiosity, a buddy of mine asked me this afternoon what would have happened if I had left the mall and decided to keep the phone. I wouldn't have done this of course and would have returned the phone, but I'm curious myself. Could they have locked it up on their end? I'm not sure since they are not a carrier, just the manufacturer of the phone.