I don't know, I read this thread about a gentleman spending 3 months trying to get an Alltel TP onto the Verizon network with no luck...
http://forum.ppcgeeks.com/showthread...=66908&page=10
Also, I have a grandfathered in account from the days of Airtouch...its such a great deal I would not risk calling them up or going into a store and bringing it to their attention, I want a phone I can just activate on their website.