How do I update my iPhone 7?

To update to the most recent, compatibile version, please see: Update your iPhone, iPad, or iPod touch - Apple Support

And: If your iPhone, iPad, or iPod touch won't update - Apple Support If the above Apple articles do not help, please post back with relevant information. 

Update your iPhone, iPad, or iPod touch

• If you have an iPhone 5S or 6/6plus, the highest you can update to is 12.5.7

• If you have an iPhone 6S through 7, or SE 1st generation, you can update to 15.8.2

• If you have an iPhone 8 or X, you can update to 16.7.9

• If you have an iPhone SE (2nd generation or later), or XR through 15, you can update to 17.6.1

Go to Settings > General > Software Update.

This link will show you how to update your iPhone, iPad, or iPod touch using WiFi -

Update your iPhone or iPad - Apple Support

This link will show you how to update using your computer -

Update iOS on iPhone - Apple Support

chyanne208 Said:

"Update: My iPhone needs a update"

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Updating an iPhone 7:

Ups a Computer to Update:

You can update using. computer. If any iOS updates are available, they will install, sure enough. If you cannot use WiFi, then Ethernet may be an option, as well (through use of a computer):

A. Back Up First:

IMPORTANT: If you have an option to update, however, then be certain you backup your iPhone first. That way, you will have something to restore your iPhone from should anything go wrong with the update

then...

2. Proceed with the Update:

Go Here:  Update your iPhone Using a Computer - User Tip

The iPhone 7, released by Apple eight years ago, cannot be updated beyond iOS 15.X.