Maybe times have changed.
But it was not easy for me to transfer from one phone to another. They asked me all sorts of questions that I did not have answer for. I can't even remember what address I used on first phone - as the Enhanced 911 gave us here (in rural America) a new street address. We used to use RFD (anyone remember that?).
But I too would like to hear from others who have.
I would probably just buy a new phone and get a new number. Much easier.