Okay so a couple months ago after I hung up a phone call, it shut itself off, was unresponsive/ dead for around 15 minutes, till i was able to turn it on. So I thought no biggie, never happened again. Now the past couple weeks my iPhone has been somewhat laggy, and when I got a call it wouldn't slide to unlock (only happened once). And now I was playing on it for around 10 minutes, take my eye off the screen, and it shut itself off again! This time it was unresponsive for around 5 minutes till I was able to turn it on... Anyone know why it shuts itself off and becomes unresponsive for x minutes? Been hearing a slight ticking noise during calls through the earpiece once in awhile too.