Called after the 5 arrived. A rep said I first need to activate on original line and go through a switch but I needed the basic phone. So off I went to get the basic phone from my mother-in-law. Got back home and called again. Got a rep who said she could do it without having to do anything with the basic phone. No problem but I did have to connect the 5 to my WiFi network to get into Apple.
My 5 is now on my line replacing a 4S and still unlimited. Since I did not have to activate the 5 on the basic phone, the data package for the basic phone upgrade was not activated.
There was almost no wait time to get a rep. Incredible.
If at first you get a clueless rep, hang up and try again.
I can now switch my 4S to my wife's line without the need to call.
I must be dreaming.
Congrats. I also spent numerous cycles trying to get someone that could help me and I gave up and activated on my own thru the web site and the nano sim and had no issues!