Initially, because the bug has been in existence since i OS 7, a jailbreak tweak was released to help out but, for those who haven’t jailbroken their devices, it seems that at long last, apple has come to the rescue.
This method allows you to restore i Phone to normal without updating i OS by using Rei Boot, a professional i OS system recovery tool. If you want to restore i Phone without updating i OS, you can download the firmware that you want to install here, and then click “Select” to manually import the firmware package. Backup i Phone/i Pad This method of i Phone restore will wipe all data and settings, so you should back up your data beforehand.Hence, you must unplug i Phone immediately to present i Tunes from downloading the latest i OS firmware file.Hope the two methods give you some clues when comes to restore i Phone/i Pad without updating i OS.Rei Boot will start restoring i Phone by using the firmware that you imported. There are several ways to backup i Phone, such as i Tunes or i Cloud. Disconnect i Phone from computer after the backup process completes. Open i Phone Settings, go to General, and then click Reset. After your i Phone has been reset, you will see “Slide to set up” message appears on i Phone, please do not start the process.After system recovery is done, your i Phone has been restored without upgrade. Tap “Erase All Content and Settings” in the popup options and confirm. Instead, plug it to your computer and open i Tunes. When i Tunes detects your i Phone, you may receive a message saying “An update to the carrier settings on your i Phone is available”, click “Update Settings”. After this, you will be prompted to restore your i OS device.