Yes, but it depends on a few things.
Sprint terminates for excessive roaming. When Sprint terminates your contract, it's ETF free.
But what you have to figure out is how to get your phone to roam. If you can do that, then the second issue is that you need a minimum of two months. Sprint will give you a bye on the first month (probably send you a notice) but the second month should be when you get the termination letter.
That's the only way I know of. One user here that I am aware of would download an Unbuntu install disk every night to his phone. 2GB of roaming data every night for 60 days. Got the boot after the second month.
----------
Some of the towers Sprint is replacing with new NV towers have equipment dating back to 1998 so you're not so far off.