These files can be used to update i OS devices manually with the help of i Tunes.
If you’ve recently downloaded an i OS IPSW file, you might be curious how to use it to update your i Phone, i Pod touch, or i Pad.
It happens when you try to connect your i Pad or i Phone to a computer with i Tunes installed.
While attempting to sync using the software on your laptop or PC, and then this annoying message come up.
Follow the exact same sequence of steps in Solution 1, except now you will enter these three lines at the end of host file (refer Sl no.
Meaning you had to have saved your SHSH blobs for the firmware version you are trying to downgrade to, or downgrading will not work.
Note #2: We will be updating this page with the latest how to downgrade guides when new firmware versions are released, so make sure you come back soon!
But if your device isn’t jailbroken and you are still seeing this error, we suggest you to still go ahead and give these solutions a try. In a Mac, you’ll find the hosts file here: /etc/hosts and for windows: c:\windows\system32\drivers\etc\hosts.2.
Fixing this error requires you to follow a few steps diligently.1.