How can I update my iPhone 6

Update your iPhone, iPad, or iPod touch

• If you have an iPhone 5S or 6/6plus, the highest you can update to is 12.5.6

• If you have an iPhone 6S through 7, you can update to 15.7.1

• If you have an iPhone 8 or higher, you can update to 16.1

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

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

Tap Settings

Tap General

Tap Software Update

What happens?