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iPhones stored for forensic analysis unexpectedly reboot, causing problems for officials
(appleinsider.com)
This is a most excellent place for technology news and articles.
On iOS this is 5 quick presses of the power button, and it vibrates in a unique way to let you know it worked, so can be done in a pocket or just without looking, which is nice. But yeah an auto reboot would be swell.
You can, see my other comment: https://feddit.org/comment/3001525