So, with the release of the 4S, I've been thinking about how much I'm spending at AT&T and how much I could be saving. Right now, with four lines (two that are completely unused - long story) on AT&T, I'm spending about $200 a month with unlimited messaging for the whole plan, the lowest possible number of minutes, 200MB data for one line, 4GB w/tethering for my line, the two extra lines for $10 each, and this is all discounted by a government employee discount. Now, looking at Sprint, I could get even better (unlimited messages + data) for only $150, and get rid of those two unneeded lines. So, with a savings of over $800 in a year, it's an obvious choice. However, like I said earlier, I'm roped into a contract with all four lines. After calculating the ETF for each line minus how long each contract has been going on for, the total ETF for all lines comes out to $1,000 exactly. Now, I can't decide if it's worth it to spend $1,000 now to save much more than that in the coming years. Alternatively, I could move the two lines that are actually being used to Sprint, pay only $440 for an ETF, and keep paying the bare minimum on the two extra lines on AT&T until the ETF becomes more manageable? As a way to break up the costs. Is this a better or worse idea? So, what do you guys think?