Here is the Free Aircel Missed Call Alert Trick:
Just go to call settings
and Divert all incoming calls to +919842201006.
OR
Just Dial *62*+919842201006# From your aircel then its activated for free ,After that you can get a sms like this
'Aircel Missed Call Alert : I was trying to call you at (11), Please Call Back'.
Enjoy!!!!