[Q] Does unlocked G2 work in Europe with full 3G? Final question topic

I read many topics (too many I guess) and eventually I don't know who is right.
A short example:
http://forum.xda-developers.com/show...02&postcount=2 <- no, it won't work
http://forum.xda-developers.com/show...4&postcount=10 <-- yes, it will work

So, who is right? Will T-Mobile G2 work with EDGE/3G/HSDPA?

I'm talking about unlocked G2 used in Poland with Polish SIM Card.