I just got a call from Comcast after having signed up with them about two months ago. They informed me that I was at my data limit and would be charged for any further usage. This was the first I knew of any limit at all and I feel like they ripped me off not telling me this up front until after I had paid for technicians to come out. I am out of about 300 dollars fooling around with these people and you can guarantee, I am warning everyone I know about their underhanded tactics.