tethering and mobile hotspot background data. What is it and how do i shut it off?

A

AC Question

My data plan is over by 4 Gigabytes. I checked my phone and it said that the mobile hotspot used 9 GB of data. How? I had limits set. I checked it just now and the phone is is saying that it is using data and I am not using it. There is .31 GB of data used for Tehthering and Mobile Hotspot background, and I am not using the tethering or hotspot. Can I shut something off or adjust something to stop this?