qualcomm 3g cell phoneCan I use my Japanese cell phone in the US?

I have a Qualcomm 3G CDMA cell phone from the Japanese cell company called AU by KDDI. I am wondering if anyone knows if my phone is usable in the US, and if so with which companies.
I highly doubt it. Japan is one of the few countries in the world that does not use GSM, as you no doubt have pointed out with the 3G CDMA. Unfortunately, the only CDMA carriers here in the USA, Verizon and Sprint, will NOT activate your phone. They have a list of acceptable phones, and if you dont have one of their models, purchased from the respective stores or dealers or vendors of their companies, you will not be able to use your phone on their networks. Of course, you cqualcomm 3g cell phonean always hack a solution, but I dont recommend this route.

BTW...most asian countries except Japan (though Japan does have I believe one GSM carrier) all use the GSM standards on the 900/1800/1900mhz frequencies, meaning that virtually any phone operating on at least the 1900mhz frequency will work in the USA. It just has to be unlocked, and luckily, most phone purchased overseas are unlocked because they are typically bought at full price and not that $39.99 sale price w/ two year contract (rediculous for a $150 phone), like they do in the USA.
ask you cell phone company if your phone is international. When we went to Europe over the summer my son and I were picking up towers iqualcomm 3g cell phonen France and in Greece but others in our group could not
just try it in the US! good luck!
if you get a different SIM card from a US carrier, im guessing? i dont know about international roaming. I have verizon which is CDMA so i dont have to worry about that. I know if you have certain ATT (cingular) phones then you can use them in other countries. i just read you have 3G CDMA so its possible it might work on verizon, sprint, or alltel. i thought the rest of the world used GSM?
i don't think you can...i mean my parents went back home from a different country(it was around Asia) and they can't use their phone anymore....