Originally Posted by Buddhahint
No thankfuly I had just got the overage protection b4 this happened but I can tell you they don't know unless you max out on your 5g limit and it is ez to do so be careful on what you use it for and keep track with a data usage app if you use it alot.
US Cellular has no way of tracking what you use your data for other than seeing how much you've used. Once you hit the 5GB cap, though, you will be charged overages unless you use points to get rid of them (Belief plan is amazing).
The Hotspot/Tether is a great feature if you need instant access to the internet for a laptop, wireless PC, etc. As Buddhahint stated, it will rack up quickly so I recommend using it as an emergency.
I've personally used it a few times, myself, and had no reprocussions as far as I know (trust me, I'd hear about it if the phone bill was penalized for Hotspot/Tethering).