I bought a iphone xs from T-Mobile 2 years ago. And about 1 year ago, there is a HW issue. Since the device is still within warranty, Apple replaced the device with another one.
I have no issue with the replaced one, until recently. I tried to get it unlocked by T-Mobile. But T-mobile can’t find this device’s IMEI in their database. And I called apple. Apple told me the device is sim locked to T-Mobile. I have talked to several representative from both Tmobile and Apple, and still got no solution. Please help.