How do l update my iPhone 7 Plus?

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.

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——055 Said:

"How do l update my phone"

Updating an iPhone 7 Plus:

Update Using a Computer:

You can use a Computer to update. Read My User Tip: Making Use of a Computer for Updating an iOS Device - User Tip. If any updates are available, they will install, sure enough.