iOS updates
Why does and error occur after I’m done downloading 15.7 update on iPhone 6s
iPhone 6s, iOS 12
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VPN or proxy connections might prevent your device from contacting the update servers.
If you still can't install the latest version of iOS, try downloading the update again:
- Go to Settings > General > [Device name] Storage.
- Find the iOS update in the list of apps.
- Tap the iOS update, then tap Delete Update.
- Go to Settings > General > Software Update and download the latest iOS update.
If you don’t see the update in the list of apps or if the issue happens again, you need to update your device with iTunes.