Can 4G Hotspots Replace Cable Broadband?

I used to pay $60 per month for a bundle of TV service and broadband service from Comcast. I decided I didn’t want the TV part anymore, so I canceled it, leaving just the broadband. My new monthly bill: $60 per month.

Ever since then, I've yearned to cut that broadband cable, severing my association with Comcast altogether. I’ll admit that my cable broadband is fast and reliable, but it’s not a moveable feast--I get to enjoy those virtues only at home. Meanwhile I’m under contract with Sprint for another data plan, for service that I can take with me when I leave the house.

I’d love to ditch the home broadband and move to a mobile hotspot (preferably the one inside my phone) that connects all my devices no matter where I am. And I thought that maybe, just maybe, with the advent of 4G it might finally be time to cut the cable.