How do I unlock my Lumia 521 from T-Mobile USA?

[WPCentral Question]

how do i unlock my lumia 521 from t-mobile usa

i have a nokia lumia 521 from a friend in the USA ,but the problem is its locked and i can use it.how do i get the unlocking code for free

 

[oviedofreak82]

Re: how do i unlock my lumia 521 from t-mobile usa

He'll need to contact T-Mobile and give them the IMEI number. He also should be a costumer of T-Mobile for at least three consecutive months.