Parallel to his new private customer tariff " CO2 o" and the business customer tariff " Business Flex" CO2 starts a Tagesflatrate for the mobile Internet use on 5 May by notebook. With " Internet Dayflat" for the Prepaid Surfstick customers for 3,50 per calender date to midnight can surf mobilely. Starting from a transfer volume of 1 GByte the speed is throttled however by HSDPA on GPRS level.