Tata indicom missed call Alert

Tata indicom providing cdma mobile network in india has no missed call alert trick still now.if any of you know the missed call alert trick for tata indicom please post a comment!so now i will explain how to activate tata indicom normal missed call alert plan.

TO ACTIVATE:
Charges 15Rs/month.
To subscribe sms SUB to 12722

TO DEACTIVATE:
sms UNSUB to 12722