Default [Q] 2100/1700 AWS band problem

Screw my bad luck i didnt know about the band stuff when i ordered my phone and i got 1700 AWS (US Global GSM) which doesn't work for 3G in my area, I cant get Global GSM, is there any way to make 2100 GHz frequency work on US GSM?

Even if it may require some hardware modding or some external support, I would really be wanting to run 3G on my phone because it's really an affordable stuff in a small range..

Any help would be supported.