Getting 3G to work...Help Please !

Hi all, i have a unlock SE K608i and have the new Cingular 3G SIM card. Went to a cingular corporate store here in Las Vegas and supposedly had my 3 G set up and stuff. Since it was an unlock phone, it was an unknown GSM device, so they had to scan my phone's IMEI bar code on back phone. They told me that they needed to do that so that Cingular will registered it as a 3G phone and send the appropriate signal/info to the phone. If you look here http://cingular.mediaroom.com/index....ases&item=1390 you can see that Cingular already has their 3G network up here in Las Vegas. My concern was that i know that the SE K608i UMTS signal uses 1900MHz and 2100MHz but Cingular only has 1900MHz open up as the 2100MHz is for military use only! Does any body know if i will be able to use 3G and Video calling??

Thanks in Advance !!