How can I upgrade my phone

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 16.1.1

Go to Settings > General > Software Update.

This link will show you how to update your iPhone, iPad, or iPod touch using WiFi -

https://support.apple.com/en-us/HT204204

This link will show you how to update using your computer -

https://support.apple.com/guide/iphone/update-ios-iph3e504502/ios