So, I often have to tether my data to my pc because my home network, when more than 5 devices on it, becomes unstable and almost unusable. So I decided to tether data from my phone. The problem is that I don't have unlimited plan and I want to tether via USB because it's more stable. But whenever I decide to do that 100 mb off of my monthly data plan just disappears. Is it supposed to be like that or is that an issue with ISP or my pc?