[Q] Samsung Infuse 4G At&t HSPA+ data working on T-mobile network.

view story

http://forum.xda-developers.com – Hey, I was recently using my phone that i got a couple days ago ( Bought it unlocked at my local Electronics store ) and i popped in my T-mobile sim card and after 1 day I looked at my status bar, I had H+ on the top right corner. I tested it out on my browser ( I was at a park while this happened ) and the data worked fast like on a T-mobile 4g phone. But it later went away after a couple minutes. I was trying to take a picture with my other phone to prove that it wasnt photoshopped or anything but i was too late. Can someone help me on this situation? Is there a way i can keep it at HSPA+? (HowTos)