Alert service via SMS is available on all mobile networks across India. Just fill all the fields by clicking here including your mobile number. Your number shall automatically get registered with this service within 24 hours (mine got registered just within an hour!).
SMS Alert Service consists of three types of alerts:
1) Threshold Alerts: You 'll be alerted by SMS when you are about to cross free data usages limit with respect to your service plan. If you cross the limit, you 'll timely alerted about the same.
2) Weekly Alerts: You 'll receive SMS alert stating your up to date usage ones in a 7 days.
3) Alerts on Demand: Apart from all this, at any moment if you want to check your usage, then simply type BBUSAGE & send it to +919447051550 (only from your registered mobile number). You 'll receive instant reply stating your current usage. Normal SMS charges (as per your mobile tariff plan) apply to send SMS to this number.
courtsey: www.saveondish.com, www.bbusage.bsnl.in