According to the data usage estimator, I should be using 662gb per month. That is very close to what I used in my first month with the service (785). My second month, usage was 2068 with no real change in my data use habit. As I wrote earlier in this thread, I changed the router password and usage immediately dropped from more than 100gb per day to less than 35gb per day. But since then it has crept back up to between 48-75gb per day, with a high of over 90 gb one day. Again, usage habits have not changed from when we first started the service in December. It simply should not fluctuate so much.