Since updating my iPad 2 to 9.3 (and now 9.3.1) it has been rebooting randomly almost every day -- sometimes several times per day. I've never experienced such random crashes and reboots with any of my iOS devices ever. Anyone else having this issue? I can't go back to 9.2.1 as Apple is no longer signing it. Is there a jailbreak available or any solution to this?