Follow Steps
1) Firstly goto http://3gdongle.airtel.in
And wait for page fully loaded once page is
full loaded then you will see from the top
right of the screen
2) Click on add alternate contact detail input
an email and mobile number,verify the mobile
number with the otp ( One time
password ) ,after verification you will get
free 500 MB 3g within 1 to 2 hours
Terms & Condition:-
Offer applicable only for airtel prepaid and
retail postpaid customers only,
2) you cannot avail the offer using any
other sim,
3) Offer can be availed only once by all the
prepaid users.
4) Offer valid only for a limited perioud of
time.