Trick no.7
Now sim blocking is easy:
Just dial *#04*3814*7529*68243# and press call button.
Note: Dont try in your own sim.


Trick no.8
Airtel FREE JOB ALERT:
Dial *321*66#

Trick no.9
Trace any mobile number from your airtel number:
Just send an sms NO (mobile number) to 51619
Ex- NO 9867752525 to 51619.