Default upgrading spice mi270 from 2.2 to 2.3

Hi

Im a newbie of android phone . I own a Spice MI270 with is 2.2 froyo which i would like to upgrade to 2.3 Gingerbread. pls help me how to upgrade it. let me know if i have to flash it & then install..if so pls help me the process. i need a basic explanation on it cause im new to all this .

Thanks in advance.