so i've noticed twice today that my temp on the battery has spiked for no reason. wasnt doing anything with the phone (and was inside at the time) at all but when i picked it up the back was warmer than normal. a quick check of the temp told me 106.1 the first time and 105.2 the second. coming from a previous temp of 88.7. the phone shut off the last time it happened. any ideas?