I chose Sprint as my smartphone carrier after seeing a TV ad talking about how they don't throttle their data at all.

I have the unlimited data plan for my mobile device, and am quite happy with it. I also purchased from Sprint a netbook with an embedded WiMax (4G cellular) internet connection, and unfortunately, there's no unlimited data plan available for it. I have to settle for a 12GB/mo. plan for about the same price as my Blackberry's plan. It's now the first month I've had my netbook, and after bringing all my offsite files in locally, I'm stuck using public WiFi for the rest of the month since I already used up my 12GB, + $250 for an additional 4GB.

The only problem I've had with Sprint so far is that the netbook's WiFi didn't work out of the box, and I couldn't use it to do my big offsite backup's download. I eventually got the corrupted apps reinstalled & afterward contacted Sprint support to try to get a credit on my overage charge, but they would only credit a third of it citing that I should have waited until it was resolved before finishing my big download project.