“I Bought the iPhone XSMax for one time payment from att. Will it work for t-mobile?”

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• Use a Verizon sim to activate it, MUST be your first activation. then you will be free to use whatever sim you would like. If you activate it with ANY other carier other than VERIZON it will be locked to said provider. Sometimes even said provider won’t be able to unlock it for you and you have to go through heaps and bounds to get it unlocked. So be wise and use a VERIZON sim.

  Answered by KnowItAllGuru 7 years ago

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• You will have to go to your carrier and pay to get the sim card unlocked and it will be "carrier free" so you will then be able to use t-mobiles sim card

  Answered by Anonymous 7 years ago

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