1. Delete the downloaded OTA update package.

Find the directory/var/mobile/library/assets/com _ apple _ mobilasset _ softwareupdate and delete all files in the directory.

2. Turn off OTA update

Use iFile on your mobile phone or iTools, PP assistant and synchronization assistant on your computer to enter the directory /System/Library/LaunchDaemons and rename the following three files (add. Bak after the file name).