Every now and then my HTC Desire S says something like "unable to access/verify(?) Google account", "please log in again", "Play store unavailable" and things like that. SO every time this happens, I notice there are NO contacts in my list! So I open play store, and I enter my Gmail and password, and then everyting is back to normal, until a few days later. It is very frustrating, and I hav absolutly no idea what could be causing this. No other Android devices are connected to my Gmail. Could it be that someone else is logging my phone out?