2) pre-paid customers can come to know abt the actual cost of the call made or sms sent, etc. done by them from the balance available. just like that the same facility shud also b made available to post-paid ie billing customers.
for this, they can devise a system so that billing customers can come to know the amount of bill outstanding since say, first day of the month. so the mobile user before making the call check the balance bill outstanding and subsequent to the call, again check the bill. the difference in the bill will the actual cost of that particular call.
this system will keep a check on unreasonably high bills charged by operators.
