Activate Free Missed call alerts service on airtel for 90 days

Missed call alerts is an amazing service from the operators ,now never miss a call even when your phone is switched off or not reachable the missed call alerts service let’s you easily know if you have missed a call with a free sms notifying the call you missed along with time and date ,this service is usually chargeable but airtel is offering it for free for 90 days.
The procedure to activate this service is very simple just register online and activate the service,you will get a confirmation message after the successful activation.
How to activate:-
To activate the free Missed call service just goto this link from your airtel sim,input your number an click submit,enter the otp received on your number,once you are logged in hover your mouse on “+ do more” and click “manage services” you will see the Missed call service offer,activate the offer ,once activated you will get a message as follows,alternatively activate this service by just dialing the ussd code *321*885# or *321*881# from your airtel sim free for 90 days
Missed Call Alert Service has been activated without charges for 90 days on your airtel mobile. To deactivate the service, dial *321*883#
Enjoy free Missed call alerts on your number for full 90 days absolutely free,once you finish the free trial,you can either renew it or just deactivate it by dialing the above code.