welll i had music playing and i was on safari searching the web on wifi when all of a sudden the music stopped and a LOUD buzzing noise was emmiting from the iPhone i stopped everything and tried putting it in sleep mode but the buzz still sounded. then i tried to power off the iPhone but it was taking to long to do so while buzzing so i just did a hard reset to get rid of it and then when it powered back on it said you only have less than 20 percent battery life blah blah. im assuming it had something to do with my battery life and multitasking but has this happened to anyone else?