I want to upgrade. T-Mobile?

I have a Galaxy S3, I reeeealallly want the iPhone 5S but I'm on a family plan with my mom. Could I like get an upgrade when I'm on the plan?
I was just gonna sell my phone on Craigslist for an AT&T iPhone 5s but if it breaks or gets damage l can't take it to the store because they'll ask didn't I have a galaxy S3. What can I do?

Well, you certainly can upgrade. I would opt for a T-Mobile phone, though.AT&T phones would have to be unlocked to work with T-Mobile (that can be impossible if the phone has been reported lost or stolen or the account is delinquent, etc.). And, when you upgrade software on the iPhone it can sometimes cause problems even if the phone has been previously unlocked and have to be unlocked again.

T-Mobile does not care what kind of phone you are using at all. My husband and I have a family plan along with two of our children and we have changed SIMS from one phone to another plenty of times. It makes no difference. Your account is linked to the SIM card, not the phone itself. If you are making payments on your phone, though, you must continue those.

If the phone is not purchased from T-Mobile itself, then you would have no need to take it into T-Mobile if it was broken or damaged as they would have no responsibility for it at all.

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