Find a friend/coworker/relative/anyone that has an old cellphone laying around that they aren't using. Chances are, someone you know has one. Borrow it (free!) and use it for the next 10/11 days. I just found an old cellphone around the house that someone in my family used a few years ago, sold my iPhone, activated the old phone with the help of a Verizon rep. Free and only took about 5 minutes.