I don't have T-Mobile as a carrier but my phone is locked to them.


    I recently bought a new S7 Edge on Ebay but it is locked to T-Mobile, My carrier is AT&T so I try to unlock it but it won't let me die to the obvious unlock eligibility for T-Mobile. So I buy an unlock code and follow the instructions to unlock it but then my phone starts that it is not registered to any network.  I have no idea what to do since I can't even place an unlock code. Is my only choice to join T-Mobile?

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