for a few weeks my, c. 14 month old, sgs2 has been acting strangely...
some days, the battery drains in just a few hours
sometimes saying charging when disconnected from charger, then saying it's stopped charging due to high voltage
the screen turning on every 3-4 minutes when charging
voice input screen popping up even though it's turned off
the clock/weather screen randomly appearing
and other weirdness
...it does *none* of these consistently, some days are fine, others two or three of the above might happen, no apparent pattern
deleting/disabling various apps
turning off wifi
today i fixed it, i changed this part...
sometimes, just sometimes, it's not the software