Do they transfer photos and files from 1 phone to another??

Download smart switch! Very Easy steps.

Are you switching phones--say from an old to a new one? Everything should synch up automatically through Apple Cloud or Google account. If you are transferring from, say your wife's phone to your's, you should probably call and ask them if they do it? (Sorry... Not much help!)

I didn't need to. But you can call them and ask.