I have been getting charged usage when I was at work and hooked up to my network in my office. Mi USB760 Modem was stillin my laptop bag. I noticed this when I saw I had used 2+GB 3 day into the billing cycle, and it was at 4:00 (I work till 5).
I know what you are talking about . I think there is a problem with their system or my modem too. They say that it isn't possible that we have used it. I just wonder because we are real close or over & we only use it for email , small amount of surfing . No you tube oe my space or anything