How do I update my ios

Make sure that you have a good Wi-Fi Internet connection and that the battery is fully charged.

Tap Settings > General > Software Update

If an update is available for your iPhone, tap to proceed with the update

An iPhone 6s, 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 15.7.5, use a computer or the Software Update function in Settings.

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