Can i flash or unlock a At&t iphone?

I want to buy an iPhone 5 or 4s but I can't find one for T-Mobile so I was wondering if I could flash a at&t iphone and put it with t-mobile but I also have some question like … Show more

You'd have to ask T-Mo if they would do it first off, and secondly, if the device has a bad IMEI, they won't even activate it.

See nanorios unlock SIM card see site below

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