Thread:JSDS/@comment-22439-20130903074848/@comment-4830404-20130925184538

Don't unplug, turn off, or do anything that could interrupt the upgrade. I'm not sure what will happen if the wifi is interrupted, but you should try not to let that happen just in case. I don't think your iPad will turn off due to power saving if it's in the middle of an update, but if you want, you can disable the power saving. As for how long it takes, I dunno - it really depends on the device and the update. It will probably take at least a few minutes. My old phone took 20 minutes for big updates, no idea about your device.