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The backup / restore routine was required by older iPhones but I don't believe it is required with newer phones. I was able to to move a 5C and 5s on T-Mobile to AT&T simply by swapping SIMs after T-Mobile unlocked the phones. I may have needed to reset the network settings. Looks like you are able to do the same thing. Your phone is unlocked.


I believe you are unlocked. I just conducted an experiment for you. I took my T-Mobile SIM card out of my iPad and put it in my locked AT&T iPhone 6. It immediately told me "SIM Not Valid. The SIM card that you currently have installed in this iPhone is from a carrier that is not supported under the activation policy that is currently assigned by the ...

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