I Guess, TATA Indicom was the only operator, among the top Indian cellular operators, that was not providing Missed call alert (MCA) service as of now. But, its a good news for TATA Indicom customers, that even they can now activate missed call alert service and keep track of calls that they miss during no coverage or when their mobile is switched off.
To activate MCA service, a TATA Indicom customer needs to send an SMS “SUB” to 12722 (Toll free), similarly to unsubscribe, you need to send an SMS “UNSUB” to 12722. Initially, the service is free for all TATA Indicom customers till 6th May 2009 and after that, customers opting for MCA service will have to incur a charge of 15 Rupee per month.