How To Disable iOS OTA Update On iPhone Or iPad | No Jailbreak
Do you wanna save your iOS 10.1.1 jailbreak?
Step 1- Fire up Safari on the device that you want to prevent from offering iOS updates repeatedly.
Step 2 - Point Safari to this GitHub link: hikay.github.io/app/NOOTA.mobileconfig
Step 4 - Reboot your device.
Step 5 - Check for new updates by navigating to Settings - General - Software Update. You shouldn’t see one even if your device is on an older version of iOS.
The reason this works is because the profile you just installed actually enrolls your device into the tvOS beta program. That sounds wrong, and that’s because it is. As your device will now go looking for a compatible version of iOS but only find tvOS betas, it will assume no update is available and as such, not offer one. It’s a workaround of sorts, and it’s very effective. Should you want to update iOS at a later date, simply removing the profile and restarting should do the trick, so it’s a completely reversible process, too.
http://www.redmondpie.com/disable-block-ios-ota-update-on-iphone-or-ipad-no-jailbreak-required/?utm_source=dlvr.it&utm_medium=twitter