A:AnswerCan't unlock until paid off to AT&T. My understanding is if you buy the phone out right for the full price then yes you can I lock through AT&T
A:AnswerDon't know about corporate line, but I'm on a family group and just added my 2 years to it. I would think you can just start fresh... think they asked me if it was a new plan or adding to an existing one
A:Answeri think yes .. if you paid the full price for it .. you will got it unlocked ..
( you have to select one of the networks at purchase but it won't be locked to that network )
and yes you can buy it with bestbuy card