A:Answer Well , when i got a pre-owned phone, it was for mobile, i had to go to t mobile store and get it unlocked for a different carrier version or att or whatever, thou it took about 15 or 20 or so , it be unlocked and then go to your carrier, place your sim chip, and you can transfer your data and whatever to the new one. But kept your old phone or about two week after used your new phone in case of problems. Does that help
