You need to be or have been a customer of Tmobile USA to be able to unlock the phone and meet the requirements in the
If you never were a Tmobile USA customer they won't be able to put in a request to unlock it.
So what can I do to unlock my iPhone? Can you show me the way? If you want to be a customer of T-Mobile how to do (I'm living and working in Vietnam) looking forward to your reply Thank you !!!!