I have a iphone 6 plus 64GB but there is no live photo button. So how can I take live photos instead? Thank you.

This option is not available on the iPhone 6. You could check out the App Store for apps that allow you to create Live Photos, such as

https://itunes.apple.com/gb/app/live-camera-for-live-photos/id1055966280?mt=8

or Boomerang by Instagram.

Live Photo's feature is available only on iPhones 6s or later. Sorry.

Regards

Giulio

You're quite welcome, dina273