Apologies if this is out of context for this thread, but I think this question is likely to be received by the right audience 
I ordered a T-mobile phone because my AT&T contract-free arrangement apparently meant i was ineligible to buy the phone through the Apple website's AT&T option. I assumed it'd be possible for me to either unlock the phone if it is locked, or I'd just go with T-mobile for a bit.
Have any of you gone through this process before?
Will this be as painless as "activate with t-mobile sim, then switch it out in favour of the AT&T sim"?
I ordered a T-mobile phone because my AT&T contract-free arrangement apparently meant i was ineligible to buy the phone through the Apple website's AT&T option. I assumed it'd be possible for me to either unlock the phone if it is locked, or I'd just go with T-mobile for a bit.
Have any of you gone through this process before?
Will this be as painless as "activate with t-mobile sim, then switch it out in favour of the AT&T sim"?