So I put in a request today 9/19 at 11am to unlock my 4S on AT&T. I got an email confirmation around 1pm telling me that it was approved and that I should wait 24 hours for the unlock process to complete and that I should then restore with iTunes and the unlock is done. Ok great. Now my question is, tomorrow I'm going to try and get the 5s as soon as AT&T opens up. If I manage to get the 5s in store, will my 4S still be able to be unlocked later in the day? You know, since it won't be tied to my account anymore.