How can I upgrade my version

VPN or proxy connections might prevent your device from contacting the update servers.

• Get help with over-the-air iOS updates - Apple Support

• Remove and download the iOS update again

If you still can't install the latest version of iOS, try downloading the update again:

1. Go to Settings > General > [Device name] Storage.

1. Find the iOS update in the list of apps.

1. Tap the iOS update, then tap Delete Update.

1. 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.

Try updating iOS after each step.

• Try to Forget the WiFi network and add it again

• Try another WiFi network 

• Toggle sets automatically off and then on

• Reset your network settings

• Force restart your device

• Remove any beta profiles, if applicable

• If everything fails: - Use iTunes or Finder (for macOS Catalina+) to update your device instead of over-the-air

• Get help with iOS update and restore errors - Apple Support

• If you see an error when you update or restore your iPhone, iPad

You want to upgrade your iOS?

The iPhone 7 can be upgraded untill iOS 15.5 the latest version.

Please see this links on how to update wirelessly or via a pc or mac

1wireless Update your iPhone, iPad or iPod touch – Apple Support (UK)

2 On a Mac with Macos catalina or higher Update your iPhone, iPad or iPod touch with the Finder – Apple Support (UK)

1. on a Mac with macOS Mojave or earlier or a windows pc Update your iPhone, iPad or iPod touch with iTunes – Apple Support (UK)