I have a new Palm Centro from Verizon. It has the unlimited data plan for the phone- but they want extra $$ for tethering, and put a 5GB limit on it to boot. I installed a $29 Palm App: "USB Modem", bought a newer tether cable from Seidio, and it works fine tethered (to my Vista laptop) without the extra fee or limits. Usually get 200-300 kbps. I imagine if I started pumping tons of data through it, they might notice- but for 6 months I've used it occasionally without problems. Good luck....