How to unlock secondhand Iphone


    I've been trying to figure out how to unlock my secondhand Iphone 7. It is locked to T-Mobile but the account & phone have been paid off. I am currently using T-Mobile but my family has been thinking of switching carriers and I don't want this phone to become useless when we eventually do so I'd rather it be unlocked! I talked to the T-Mobile staff and they said the person who originally bought the phone needs to be the one to request an unlock. Do they take requests from t-Mobile customers as I am currently a customer of T-Mobile?? Please let me know how I can proceed.

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