Warning! : verizon will not let you grandfather in to your unlimited data unless your buying the phone full price. I found out the hard way when I got my 3s. Good news is, I never get near 2 gigs. Now I can text and talk unlimited which I did not have before.
Before my gf and I broke up I was on her att family plan. It was her and I with iPhones and her dad with some og flip phone. Just had to transfer billing responsibility for my account to her name and I was good to go with the same number I've always had
For my 450mins/2gb of data I was giving her $50/mo.
Was a sweet deal until we broke up. Now I pay $110/mo on my own plan.
Been with AT&T forever to and have never had a problem.