qualcomm 3g cell phoneCell phone+ will it work in Europe?

I just bought a LG CU500 cell phone; 3g Qualcomm and Quad-band

if I travel to Euqualcomm 3g cell phonerope will my phone work or will I have to buy a new sim card

My provider is qualcomm 3g cell phoneCingular
it will work there, it'll just be expensive for roaming charges