put this shit to rest n00bs
this has been debated and cried about since before the 3g came out
THERE IS NO WAY IN HELL OR HEAVEN OR ON EARTH TO MAKE 3G WORK ON TMOBILE IN THE USA
europe is a different story
see here in america we are only free to do what we are told
tmobile uses frequency A
at$t uses frequency B
thats just how it is
you can try to dismantle a mytouch 3g from tmobile US and put its 3g card in the iphone in place of the at$t one
and IF ur phone still turns on after that, then you could rewrite the baseband to use the new hardware and frequency
THEN make the iphone OS understand all that
configure your parameters for throughput and bandwidth debugging troubleshooting and what not
and then of course make sure the unicorn jumps over the rainbow,
blah blah blah
so yeah, it can be done!
any super genius electronics/hardware wiz could do it.
so whos gonna be first to try????