How can I upgrade my iPhone 7 to iOS 16?

Toll me how i can updeta my iphone7

That is not possible, your phone doesn't have the hardware needed to run anything higher than iOS 15.8.3

An iPhone 6s, iPhone 6s Plus, iPhone 7, iPhone 7 Plus, or iPhone SE 1 isn't capable of 16 or above; they require an A11 or better CPU. To install 15.8.3, use a computer or the Software Update function in Settings.

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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 15.8.3

• If you have an iPhone 8 or X, you can update to 16.7.10

• If you have an iPhone SE (2nd generation or later), or XR through 15, you can update to 17.7 or 18.0.1

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

Read through this post, the answer has already been given. If you are on iOS 15.8.3, then you can go no higher on an iPhone 7.

I mean to update my iphone

Upgrade to space

No, if you have an iPhone 7.

Yes, if you have an iPhone 8 or iPhone X.