I want to upgrade my iPhone
How can I upgrade my iPhone
iPhone 6s, iOS 14
Question marked as
Here are two different ways to ensure the highest iOS that your device will support is on your device.
Update your iPhone, iPad, or iPod touch wirelessly. Click here --> Update your iPhone or iPad - Apple Support
Here are instructions about how to update your iPhone, iPad, or iPod touch with the Finder on a Mac computer --> Update your iPhone, iPad, or iPod touch with the Finder - Apple Support
Your iPhone 6s can update as far as iOS 15.7.3