I want to update my phone

An iPhone 7 Plus isn't capable of 16 or above; they require an A11 or better CPU. To install 15.7.3, use a computer or the Software Update function in Settings.

(236513)

fosu32 Said:

"I want to update my phone: How will I update my iOS?"

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Updating an iPhone 7 Plus:

Update Using a Computer:

Have a Computer Handy? If so, try using a computer to update. Go here: Update your iPhone Using a Computer - User Tip. If any updates are availabe, they will install, sure enough.