I have attached a screenshot of the band selection page in my Pro2. It is a hidden setting that I enabled.
It shows that it has the following band selections:
gsm (900+1800) + UMTS(2100+900)
gsm(1900+850) +UMTS (1900+850)
UMTS(2100)
So, I may be not a techie, but it appears to me, that you would just have to select the proper set of bands.... Am I right? Or am I not reading it correctly?