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on 5/17/19Hello Jen. It really depends on the Financial and Contract status of your AT&T USA iPhone. If after the Cleaning process it still has Unpaid Bills, then unlocking it has very low chances. If you can provide us an IMEI Check report to see what exactly is wrong with your iPhone, we will be able to reply you with 100% certainty if you can use this device with Verizon USA network. If you do not have one, you can order our iPhone IMEI Unlock check service from our Home Page.