First he's with Verizon, second, Sprint data is not unlimited (though they say 4G data IS, you are had pressed to find 4g areas). That said, I've tethered without separate dataplan (via root type set up/masking tether as cell surfing) on my WinMo phones and Blackberry without any extra charges. So, yeah there's that. Wifi Hotspot on a rooted Droid should not cost extra for Verizon. shouldn't even need a extra 'tether' plan just a regular phone data plan.