Before anything else, you should try to forcibly reboot the i Phone.
Do this by holding down the Power button and Home button until the device shuts off and turns back on, signified by the Apple logo.
“An error occurred downloading i OS 10”, “An unkown error occurred (14)”.
Those i OS 10 update issues can be caused by different reasons like factory resetting, wrong operation to upgrade to i OS 10 or unknown reasons.Yesterday, when I upgrade my jailbroken i Phone 5s to i OS 9 directly without i Tunes, not update by firmware upgrade, what's make me crash is that my i Phone stuck on Apple White Screen death during upgrading to i OS 9, I have wait it a long time, but it does not have any progress.Now I want to get i Phone out of Recovery Mode and fix Apple White Screen of death after failure upgrading to i OS 9, someone here can help me? " Here, before solving the white Apple screen of death issue, we had better know why the i Phone got stuck on the Apple logo, which can help us to perfectly solve it and prevent it from happening again.This guide will show you how to fix a frozen i Phone without losing your data or visiting an Apple Store for help.You can fix a frozen i Phone in 10 seconds without a computer or any other accessories so that you can get back with your day.