how do you know if your phone has a virus on it?
['Data usage: The first sign that your phone has a virus is the rapid depletion of its data. ... ', 'Crashing apps: There you are, playing Angry Birds on your phone, and it suddenly crashes. ... ', 'Pop-ups: Many websites have pop-up ads. ... ', 'Unexplained charges: Ads and crashing apps are annoying.']