WE CANNOT UNLOCK THIS DEVICE FOR YOU BECAUSE WE DIDNT SELL OR ACTIVATE IT
My sister presented me Iphone X. IMEI checked is clean and she is used AT&T USA before. She also did a paid check and it said this device is clean and paid off.
I have have tried to unblocked on AT&T web and it says that we cannot unlock this device for you because we didn’t sell or activate it”
How do i solve or unlock this ?