Please explain how data is used. To save data I have been turning data off when it is not in use and turning data on when it's used. I have used data 3 times each time for simple quick web use such as checking email or a data base, no streaming and no video chat. First time it said I used 25mg , 2nd time said 50 mg total, and 3rd said 70mg total. This sound like a lot of data for minimal use. Is there a minimum data amount each time data is used? Is there a data charge when data is turned on or when data is turned off?