Restoring your i Phone without updating it is not that common, but people do it from time to time as a measure of keeping their current operating system installation or it can be useful as well when you don't have an internet connection.
During this time, please click "Cancel" when you're asked if you want to upgraded to a newer version of i OS.
Then your i Phone will be restored without i OS update.
This way is the best way to restore your i Phone without updating i OS, and it's available for every i Phone user. You can choose to use i Tunes or i Cloud to get them backed up.
If you have important data on your i Phone, you're suggested to back them up first.
When the pop-up message appears, click "Erase" to confirm it. When the resetting is complete, there will be the "Slide to set up" message on your i Phone's screen. If your i Phone has been unlocked before, connecting it to i Tunes will reapply the unlock code, allowing you to use the phone on other networks again. After the unlock message, you will be prompted to restore your i Phone.When you receive a message saying "An update to the carrier settings on your i Phone is available. Select the backup that you just created and then wait until the restore is complete.Tick the item you want to keep and click "Recover" to save them to your computer.Disconnect your i Phone from the computer and go to "Settings" "Erase All Content and Settings".
You can download the free trial version below to have a try.1) Plug your i Phone to the computer and run the software.