At what time of day does my monthly billing period reset? According to my records it reset yesterday. Since yesterday I've use approx. 4MB however my usage show 24MB. The night prior to my reset I was 'wasting' data because I had approx. 100MB left over. I stopped using the data around 11PM so I'm thinking the period resets around 10PM The previous night... Perhaps it's based on a different time zone?