T-Mobile in USA use different method of removing simlocks - its Mobile Device Unlock app but in many cases permanent unlock simply doesn't work.
We can help if you're one of those unfortunate cases:
On our site we have complete instructions and price of which other services can just dream: €7.99. Wait time is 1-3 days and have 100% guarantee.
Official Unlock for T-Mobile USA by APP
We support all models of following brands: Alcatel, HTC, LG Samsung, Sony and ZTE.

See More: T-Mobile USA Unlock by APP