my ipad froze while i was trying to update to ios 8.4 how do i unfreeze?
how do you unfreeze an ipad that froze while installing ios 8.4 update?
iPad, iOS 8.1
You could try a soft-reset : press and hold both the sleep and home buttons for about 10 to 15 seconds, after which the Apple logo should appear and it should reboot.
If that doesn't work then try recovery mode and restore to your backup : If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support