I have 4 lines on a family account, i'm the owner of the entire account - I have TWO upgrades on my account and there's literally no way to be able to keep the unlimited data if the upgrade is on the line that has unlimited. It only works if you use a tiered line's upgrade for your unlimited line.
I know this might seem hard to follow but in short:
Unlimited Line has upgrade = wasted, nothing you can do with it
Tiered line has upgrade = useful for unlimited line
I don't find really any phone being with $600 to $700 after tax. That's just plain robbery. I've been doing it on my past 2 phones and now that I have upgrades actually available, i'm plainly fed up. I threaten to close my account with VZW but they would LOVE for that to happen because they don't want unlimited plan folks on their network anymore.
Now it's a game to test my wits.. How long can I go with my SG3 before going insane? I have to wait another year for one of my tiered lines to have an upgrade available.