When your device gets into an endless reboot loop or keeps restarting, or freezes at Slide to Upgrade screen after update to i OS 10, you can try to do a hard reset, force reboot i Device with free i OS 10 device reboot software, factory reset your device or do a system repair. These 4 methods can be applied to i Phone 7/7 Plus/SE/6s/6s Plus/6 Plus/6/5s/5c/5/4s, new smaller i Pad Pro, i Pad Pro, i Pad 4/3/2, i Pad mini 4/3/2/mini, i Pad Air 2/Air and i Pod.If the Power button and the Home button on your i Phone are still workable, the hard reset comes in handy.Here I collected the 4 common tricks on how to fix i OS boot problem on i Phone, i Pad, i Pod to share them to people having the same problems.These may also works for reboot issues after i OS 10/9/8 Pangu jailbreak, after on You Tube (or other Apps) the screen turned blue and started an endless reboot.Download and install this freeware on your Mac (OS X 10.11 El Capitan, OS X 10.10 Yosemite, 10.9 Mavericks, 10.8 and lower).If you are running Window 10/8.1/8/7/XP/Vista, free download Rei Boot for Windows.
Note that a fixed version of i OS 9.3 is arriving soon from Apple, which will remedy many (if not all) of the problems encountered with the software update for i Phone, i Pad, and i Pod touch users.
And a warning: bear in mind that if you do change your mind afterwards, it may be too late to go back.
We discuss the methods used to achieve this in our article How to remove i OS 10 and go back to i OS 9, but they are dependent on Apple still 'signing' the old version...
Upgrading i Phone 6 to i OS 10 but crashing into i OS 10 update loop – this is what I met.
Searching the Apple forum, I found many i Device users are suffering the same i OS 10 or i OS 9 reboot loop issue.