Information on Data Usage Meter needed


Apr 26, 2007
Hi,Can any DataOne user help me to clear confusion regarding billing procedure? Does BSNL count one month time period for free data usage based on the installation date or in calender month? For example, if my bb is installed on 25th March then when the one month period will be completed.My free 1GB data usage will be completed on 24th April or on 31st March.If it is completed on 31st March then what is the procedure as I'm using only 10days & paying for the whole month or will I be charged for 10 days rent & free usage limit for 10 days based on (1024Mb/31*10). Customer Care couldn't answer to this question.