Keep holding the two buttons until you see the screen go black and then see the Apple logo on the screen as it restarts.
Sometimes even a hard reboot cannot get i Phone back to normal.
These will work if you’re on i OS 9.0, i OS 9.0.1, i OS 9.0.2, i OS 9.1, i OS 9.2, i OS 9.2.1, i OS 9.3, i OS 9.3.1, i OS 9.3.2, i OS 9.3.3, i OS 9.3.4, or the i OS 9.3.5 update.
If your device’s screen stops responding after upgrading to a new version of i OS 9 update, there’s no need to panic. We ran into this problem right after we installed the update on the i Phone 6.
I have also tried to update through i Tunes 11.4 on my computer, however a message pops up stating that the network connection has timed out.
Are Apple's servers overwhelmed, or am I doing something wrong? One known condition for the install is that the device must have ~5GB free space for the temporary download of the installer file.
Fortunately, we were able to fix it very quickly with a simple solution.It occurs when you are trying to do something which requires contact with Apple's servers.This error may occur when updating software or restoring i Phone/i Pad via i Tunes.We list the most frequently issues below, and give solutions to fix.When you are bothering with one of these issues, your i Phone or i Pad is completely dead and even i Tunes cannot recognize it.