Updated Mar 05,2018 | by Niko
Many of you must have noticed that iPhone gets slower and slower after every iOS update, especially for the old iPhone models like iPhone 5s or iPhone 6. Although iOS 11 is released with many great new features, many iPhone users still choose to give up the update.
The annoying thing is that, Apple likes to make sure as many users are on the latest iOS system as possible, so it automatically downloads the update on your iPhone and iPad in the background. Once it is downloaded, your iPhone will ask you to install the update constantly.
If you are tired of getting the update notifications, luckily, there is a reliable way to disable iOS 11 update on iPhone and iPad.
In this tutorial, we’ll show you the complete steps of how disable iOS 11 update on iPhone/iPad.
How to Disable iOS 11 Update on iPhone and iPad
Automatic Downloads is enabled by default, so you'll need to turn them off. This won't help with the current update, but it will stop you from getting these notification messages in the future. So the first thing you should do is to dive into Settings and to turn Automatic Updates off:
1. Tap Settings
2. Tap iTunes & App Stores

3. Toggle off Updates underneath AUTOMATIC DOWNLOADS

This will prevent iOS system from downloading updates in future. However, to make sure that your iPhone/iPad will never pop up the annoying update notifications, you still need to delete the update you've downloaded.
How to Delete the Downloaded iOS Update
Turning off the Automatic Updates doesn’t mean that the downloaded update is removed on your iOS devices. Now it's time to get rid of the update on your iPhone/iPad. Then you can avoid accidentally updating your iPhone/iPad. Here’s how to do this:
1. Tap Settings
2. Tap General

3. Tap Storage & iCloud Usage

4. Tap the first Manage Storage below Storage

5. Scroll down the screen to find the iOS 11 update

6. Tap Delete Update and delete the update in the Delete Update alert window

Note: Some people are wondering how to cancel iOS 11 update while downloading. The steps are just the same as the above.
Finally, you manage to disable iOS 11 update on your iPhone/iPad and eliminate bothersome notifications.
Some users have reported that iOS re-downloads the iOS 11 update when the iPhone/iPad is connected to Wi-Fi. If you see the "Install Now" and "Remind Later" alert again, check in your Storage & iCloud Usage and delete the iOS update again.
If you’re interested in iOS 11 or upgrading to it, you can find a complete guide on this new version of iOS from iOS 11 Upgrade Tips.
Related Tips:
iOS 11.2.5 is Available for iPhone and iPad, Should You Update?
How to Use AirDrop on iPhone in iOS 11
How to Force Quit Apps on iPhone X - Force Close Running Apps iOS 11
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