It definitely is. Like I said, I'm using my phone as a hotspot for all my other devices, including television. They launched an investigation of my data use a few months ago, but I successfully fought them off. They were concerned that I was using it for some commercial purpose that's outside the terms of service. But I carefully itemized the various devices I was using, and attested that all use was strictly personal, within the bounds of the contract, and they agreed.