iPhone unlocked with personal hotspot working on T-mobile

[osofast240sx]

Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

Does any one else have this?
http://instagr.am/p/IG9gQos5dO/
http://instagr.am/p/IG9zYOM5dQ/

I have a iPhone 4 unlocked from apple, my phone is not jailbroken.

 

[JKruijv]

How?

How did you get this working?