I also wanted to see if it's possible to reflash to be compatible with 3G networks in America (AT&T, Tmobile). I did find out from AT&T and Tmobile that you need their firmware to use their 3G networks, because they are not open networks. Even if you were able to use their frequencies with an unlocked, unbranded phone, you would still not be able to access their 3G offerings, according to their representatives.

I'm not sure if this is true or perhaps someone could confirm.

Regards