My iPhone keeps rebooting/shutting down by itself?
I have had this iPhone 5 since just months after it was released in 2012. Dropped it a few times, but nothing major happened except for the lock button busted. Recently, my iPhone just keeps on shutting off all by itself. I could be on whatsapp or instagram or something and the screen will just shut down. Or sometimes lines will appear slowly and then it'll shut down. Other times, the same thing will happen but it'll reboot. But I've noticed that if I'm charging the phone, it doesn't really crash as much. Still does though. And I mean not just crashing like once a day. I mean I use it less than 2 minutes and it'll crash. And if it's not charging, it tends to die even more easily than when I'm not using it. It almost certainly will die every single time when I lock the phone. What's the matter? ): Help!