Lot of good advice, thanks folks.
I use T-Mobile. I don't steam video or even music, not a gamer. But I make heavy use of the hotspot/wifi tethering feature for Skype voice calls and screen sharing, lots of remote desktop, and git. They let work from home, but I get cabin fever and there are lots of nice parks nearby. It's much cheaper to go through the phone than to buy a hotspot and data plan.