How can I update my iPhone 7 Plus software?

Hello~ Click on below and review…

Update your iPhone or iPad - Apple Support

If you are having issues…

If your iPhone or iPad won't update - Apple Support

Note once inside the links above you may click on highlighted tabs of interest for more information. Also your iPhone 7s can only be updated to the highest version of iOS 15. If you need a higher version of iOS you’ll need a newer iPhone. Click below to shop for a new device…

iPhone - Apple Official Site

If you purchase a second hand device please take a moment to read these helpful links by clicking on below to make an informed decision…

Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Also:

The All Too Common SAD Reality of Buying a Used iPad/iPhone

~Katana-San~

You can update an iPhone 7 Plus to the latest release of iOS 15. You cannot update it to iOS 16 or higher.