Restore ipod without updating
There is a caveat here though, and that is the device must be running system software later than version i OS 5.0, so older hardware may be left out.
A new version of the i OS for your device brings new features, bug fixes, and exciting changes to the way you use your phone.
One way of potentially restoring your unlock is to save your SHSH blobs, which is what is used to authenticate your i Phone with Apple.
This process is only possible using a downgrade, which can be a fairly difficult operation to complete (Apple authenticates all new software installs using their own servers).
Select your i OS hardware to get a complete list of i OS updates for that device: That’s all there is to it.
This is often a more reliable way to get an i OS update immediately, sometimes i Tunes will time out during the download when an i OS update has just been released, this is probably due to server overload.
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If an update is available, tapping on Download and Install will finish the process for you with no attachment to a computer and no i Tunes at all. This is by far the easiest way to get the i OS update installed onto a device and requires no computer at all, the whole thing is completed on the i Phone or i Pad.