I came across a pretty interesting article from 9to5Mac that Apple has posted that shows the differences in how to do different actions on a GSM & CDMA iPhone. It's a pretty interesting read in my opinion for users that want to switch from one cell service to the other.
http://www.9to5mac.com/52244/apple-...Mac+-+Apple+Intelligence)&utm_content=Twitter
http://www.9to5mac.com/52244/apple-...Mac+-+Apple+Intelligence)&utm_content=Twitter