An iPod Touch's "Recovery Mode" is for alleviating
major operating system issues.
Recovery Mode rolls back your iPod's operating system,
stripping problematic updates and downloads from the unit.
The goal of this total system recovery is to revert the iPod
to a stable, usable version.
Before you use Recovery Mode, exhaust other troubleshooting
In some cases, Recovery Mode is triggered automatically
after a failed system update or system restore.
When it goes into Recovery Mode automatically, you cannot
use your iPod until you complete the recovery process.
You can get your iPod Touch out of Recovery Mode using
Apple's free iTunes software.
Turn on your computer and open iTunes.
If you are prompted to download any new iTunes updates,
install the updates before proceeding.
Plug an iPod USB cable into your computer.
Do not plug the other end into your iPod Touch yet.
Turn off your iPod Touch. If the iPod Touch is already shut
down, skip this step.
Press and hold the Home button on your iPod Touch, and plug
the other end of the USB cable into your iPod Touch.
Release the Home button after you see a white USB icon and
the iTunes logo appear on your iPod Touch's screen.
At this time, a pop-up should appear on your computer
screen, explaining that the software has detected an iPod in Recovery Mode.
Click on the iPod Touch from underneath the
"Devices" heading on the left-hand side of your screen.
Click on the "Home" tab, and then click
Once it's restored, your iPod Touch goes out of Recovery
Mode and you can start using it again.
The restoration process takes a few minutes.
Do not disconnect your iPod Touch until a prompt appears,
letting you know the system restored successfully.
iOS: Unable to update or restore