So many things cause my 520 and my 920 to heat up and just lose battery like there's np tomorrow! Web browsing, /any/ messenger besides the built in one, Facebook, wpcentral, most games, I have had this phone for 6 months, and I have never found an answer. Is it an OS bug? What causes this? Are there any rememdies /besides/ the good old turn off, cool down, turn on? Thanks for reading.