How do I update my iPhone 6 to iOS 14?

An iPhone 6/6 plus 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 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 iOS on iPhone - Apple Support Update iOS on iPhone - Apple Support

Your question has already been answered.

An iPhone 5s, iPhone 6, or iPhone 6 Plus isn't capable of 13 or above; they require at least 2GB of RAM.

(239470)

How to update my iPhone 6

It's not possible to update an iPhone 6 to iOS 13, 14, 15 or 16.

I want to update my iPhone 6 to iOS 14

I want to update my iPhone 6 to my iOS 14

Man uxshamade

iOS 14