HTC Fuze / Touch Pro (GSM)
I know at&t phones are ran on sim cards, so could I put my t-mobile sim card in it?
The phone is locked, its not very hard nor very expensive to get it unlocked. There are several reputable online sources for that.
It will work on TMO, but only on Edge, no TMO 3g.
at&t will unlock it for you for free
After 90 days or a well established customer.
More then likely xda-dev will have a free unlock sometime very soon, just has they have had for the Tilt, 8525, and 8125.
or if you bought the phoen out right with out cantract att will unlocl it for free.
You think so? I'm not so sure. Well one can try