So, I have to replace a phone on my family plan. I haven't upgraded the line in over 4 years. It needs to be a dumb phone. I love my S2, but I started thinking about other phones slated to release in the next 6-8 months, like the Note (if it ever makes it here). I'd love to switch between my S2 and the Note, but I don't know how all this works. I know this topic has been discussed in here many times, but I'm confused about how it works and also, if you had an upgrade for a second line coming, what would you do with it?