I had applied for a plan change in mid april through the exchange counter and got a
dot matrix print out which said that my plan would change from 30th of april. I got up at 3 in the morning on 1st may and download 10mb of data and switched of the computer. Next morning i got up and tried to check my usage details on data.bsnl.in but the servers were down for billing issues. On the 3rd of april, the usage showed that i will be getting billed for the 10mb i had downloaded. I called the customer care and they told me that they didn't have the power to track my orders and advised me to call the local bsnl guys to get best details possible. I called those guys and they said the plan change will be done by tomorrow i.e., 5th may 2009.
Below are some screen shots which might be helpful for some users. You can track my whole broadband history in this thread.
Taken on 4th may : 12.00pm noon : bbservice.bsnl.in > My orders
Taken on 4th may : 12.49pm noon : bbservice.bsnl.in > My orders
Taken on 4th may : 01.00pm noon : data.bsnl.in > My orders
Notice the "service effective date". Means the new plan billing will be effective from tomorrow i.e., 5th may. Doesn't matter if it gets provisioned today i.e, 4th may.
My billing should be according to pro-rata basis.
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From 1st May to 4th May
Allowed usage for 4 days:
Per day - 1024/31=33.03mb
For 4 days - 4*33.03=132mb
If i go above 132mb then the excess will be charged
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From 5th May to 31st May
Allowed usage for 26 days:
Per day - 1536/31=49.54mb
FOr 26 days - 26*49.54=1288mb
If i go above 1288mb then the excess will be charged
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so technically, i'm getting 1453mb of allowed usage for the month of may. That's more than fair.