That worked perfectly!Atlast I got a solution for my never ending BILLS!I hope you know about this bug in bsnl:When you switch on the modem at 2 a.m and download from 2-8 am some 4 GB, and then switch off the PC at 8 am but not the modem, then BSNL will calc the usage from 2 A.M till the time you had SWITCHED off the modem. And then makes some random calculation, to put up some usage in the LIMITED BANDWIDTH HOURS.For Ex:Start Stop Total[KB] Duration[second] Traffic(KB) Excluding Nt UL02:02 - 08:30 - 4940236 23280 102340But I would've switched off the PC by 8 am itself, then how can it download 100 mb???