If you own an iPhone or iPad, you've definitely seen the above image before. Probably a few times everyday. No matter how many times you click "Later" it just doesn't seem to leave you alone.
In order to stop this message and to prevent future messages from appearing, you need to first delete the update and then disable automatic download. The truth is, if you see this message on your device, the iOS update has been already downloaded. Your device is just pestering you for permission to apply the update.
To regain your sanity:
Delete iOS update. Go to Settings, General, Storage & iCloud Usage, and then Manage Storage. Now scroll down and find the iOS update in question, tap it and then select "Delete App."
OMG. Delete me!
- Disable automatic OS updates. Go to Settings, iTunes & App Stores and deselect Updates.
No more, please!