How can I update iPhone 6
How to upgrade my iPhone to i os
iPhone 6s, iOS 15
Apple Intelligence is now available on iPhone, iPad, and Mac!
How to upgrade my iPhone to i os
iPhone 6s, iOS 15
An iPhone 6 can't be updated beyond 12.5.7, it doesn't have the hardware needed to run anything higher.
If you need a higher iOS version, you will have to purchase a newer phone.
To update to 12.5.7 -
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
Update of IPhone
How can I update iPhone 6