Unlocking Iphone

I will tell you that T-Mobile's rules are that you are a current customer in good standing for a period of at least 45 days before you can request an unlock. If you just purchased this phone from someone, I recommend that you return it for a refund. Your ability to get this device unlocked is going to be very difficult.

The only way to unlock from the current carrier it is to get an unlock code from T-Mobile.

T-Mobile's contact page:

https://www.t-mobile.com/contact-us

There's an international number on the page, and an address to send regular mail to. I didn't see an email option, which seems rather weird.