how to reset motorola a925

any one can help us with how to format or reset motorola i bought a new of motorola SLVR and i wonder if i can reformat the phone in case virus attack ?
i used to have nokia 6630 and i was almost knew every thing about it format,download and fix problems

any one can help us with how to format or reset motorola i bought a new of motorola SLVR and i wonder if i can reformat the phone in case virus attack ?
i used to have nokia 6630 and i was almost knew every thing about it format,download and fix problems
thank you