In the month of May 2008, I entered into a service agreement with AT&T wireless to receive internet service by means of an air card. This agreement was for unlimited access. No overage charges would apply for use that exceeded 5 gigs per month. For the past 10 months, I have not had an occasion to use the air card at all. In the month of January 2011, my work has placed me in an area where it has been necessary to use the air card extensively. On January 15, 2011, I attempted to utilize the air card and was prompted by a pop-up information... read full review »