I am not sure about Verizon but a little over month ago I left AT&T (with unlimited data) and switched to Verizon. When I got no reception with Verizon inside my house I called AT&T and they told me that if I came back within 60 days they HAD to offer me the exact same plan as I was before I left. He made it sound like they had no choice. So if it a law thing (again not sure) then if you have been gone for less than 60 days you can try calling and asking. Either way it won't hurt to call them and ask.