Hello, I bought the iphone 7 on Ebay and it came written "T-Mobile unlocked". When I arrived in Brazil, I went to open and remove the chip from T-Mobile and put my chip (contract with Vivo). When I did this, a message appeared saying that I needed to contact Apple to unlock. I called Apple and they asked me to call you. And now, how do I use the equipment here in Brazil?
Were you able to solve your problem? I am with an iPhone 6s bought on ebay with the same situation: The seller said it was unlocked but was actually blocked by T-Mobile.
Manage your T-Mobile account