Hello. I bought an iphone 8 in a Best Buy store and it was sell like an universal unlocked phone (I paid full price, without carrior) to use here in Brazil with my carrior. However, when I inserts the SIM of the Brazilian operator, it appears that the phone is locked. I called Apple and they told me that my phone is locked by T Mobile and I should ask you to unlock. So, I would like to know how to unlock this device to use here in Brazil. I don't have any T mobile Sim card.
Message was edited by: tmo_amanda to remove personal information
Only if a T-Mobile SIM was inserted into the phone prior to using your SIM in Brazil, it would be locked to our network. Either way, you still need your phone unlocked. Please take a look at this thread: I bought an Iphone 7 on Best Buy with Flex Policy, as you'll find the information in it useful.