Wtf? I frequently tether my T-mo 3G phone when needed, and I got some sms saying I needed to sign up for a tethering plan when I used it for apparently long enough for them to detect it. What plans have tethering included?
You would need the Simple Choice plan with unlimited data to receive 2.5GB of mobile hotspot [1]. If you click unlimited and look at the panel on the right you'll see it. "Unlimited high-speed data on our network. Up to 2.5GB of Smartphone Mobile HotSpot (SMH) service."
