How to update to IOS 14 ?

If you perform an update procedure on your iPhone 7+, it will get the latest supported iOS version for that model (now 15.7.3). These are the generic instructions:--> Update your iPhone, iPad, or iPod touch

Specifically:

Assuming you're trying to update your device wirelessly, and bearing in mind that to perform such a procedure you need to connect your device to a reliable and fast Wifi Network with Internet access (no cellular data, unless you use a 5G network, no personal hotspot on your device, no VPN connections are admitted, no Low Power Mode enabled, and I suggest that you keep the device plugged into power during the whole update process), read this support article:--> If your iPhone, iPad or iPod touch won’t update (if you don't have a reliable and fast wifi network, "borrow" one from your relatives/friends/neighbors).

Also, make sure your device is NOT running a Beta operating system version. Should be this case, you need to remove it before installing any official iOS/iPadOS releases, as per these instructions:--> How to uninstall iOS or iPadOS beta software - Apple Support.

DO NOT forget to create a full backup of your device before updating its operating system, and keep in mind that, depending on the available storage on your device and/or on your wifi network speed, it might take 30-60 minutes to complete the entire update process.

If the issue persists or if the iOS version currently running on your device is very old (from your product list, it seems that the device is still running the prehistoric iOS 13), try to update it via computer (if you don't have a computer borrow one from your friends/neighbors, or ask for help at an Apple Store or Authorized Service Provider), then learn how to update your device manually if you're using a Mac with macOS Catalina or later, or if you're using a Mac with macOS Mojave or earlier or a Windows PC.

If you still get no help, contact Apple Support directly, using this link:--> Get Support

Regards

Giulio

Please review the first sentence in the reply above from ProustGiulio:

If you perform an update procedure on your iPhone 7+, it will get the latest supported iOS version for that model (now 15.7.3). These are the generic instructions:--> Update your iPhone, iPad, or iPod touch

So, please tap on the Update your iPhone, iPad, or iPod touch link

Follow the next steps

1.-Go to settings

2.- Select “General”

3.- Then select “Software Update”, it’s below “About”

4.- You should be able to update to the latest iOS supported version

You cannot update to iOS14. It is no longer available. If you have an iPhone 7 you can update to 15.7.3.

iOS 14 is not available for iPhone 7, but instead you can update to iOS 15.7 which is the latest supported update for your device.