I am looking into upgrading my phone (contract is up in April) and I see that Verizon currently has a buy one get one free promotion with the caveat of it being a new line added. I have my parents on my account but was wondering if I convince one of them to cancel their cell phone (they aren't under contract) for a day if I can turn back around and have them be the new line to get the free phone. Worst case is they wouldn't be able to keep their current phone number. Thoughts?