I bought a $39 per month mobile broadband plan last year, it offers 5 GB every month, and my Windows computer could show the usage per month, so I follow it to ensure I do not overload, otherwise I should pay extra. I am very sure I never used over 5GB every month from last year until now. However, it charged me $165 for November, 2008 and even $335 on Feburary 2009. I was really shocked because it showed I just used 2.56 GB for Feburary. I took all the evidence to the shop, they told me the window showed on computer is not accurate, if it i... read full review »