Sprint Nextel recently settled a lawsuit over the early-termination fees (ETFs) on their contracts. I believe the it was over the fact that the ~$200 fee stayed flat even if you were on the last month of your contract. You can find details at SprintETFSettlement.com.
There is a whole bunch of legal-speak in there, but it would appear to me that anyone who was a Sprint customer and entered into a cell phone contract between July 1, 1999 and December 31, 2008 should take a closer look. If you click on “File a Claim” and enter your information, it will guide you to the award you are eligible for. You’ll need your Sprint/Nextel phone number at the minimum.
In general, it would appear if you were charged an ETF and can provide documentation, you can receive $90. Even if you didn’t cancel your contract, if it was because you were afraid of the hefty cancellation fee, you can get a check for $35 for each line.