Trying to clarify something... This might seem like a really dumb question and something I should know already, but I need to make sure I have my info straight. I recently used an upgrade on my line and brought my wife over on a new line to start a new 2 year contract. If I ever activate my old phone on my line, will that mess with the contract at all? Verizon told me it didn't matter as long as the contract stays in place, but a part of me thinks that's weird, since I got a huge discount on the new phone b/c of the contract. Though, and maybe this is my answer, I'm guessing my phone's ESN is tied to my contract no matter what phone is activated on my line, so it's not like I could sell it... I've been off contract (month to month) so long I'm trying to make sure I understand this. Is my thought process correct?