Ryt. Some system, where they alert us after a fixed amount is used up, or after a fixed amount is left.Say every 5 odd MB they can alert us. But ryt now, even on Idea, i get around 250-300 sms alerts daily. Daily means around 12 odd hours in a day. Coz i switch data network mode "On" at around 8 AM in the morning & switch it off by 8 PM in the night.