1. First of all Insert your airtel sim on your mobile or at dongle
2. Visit the offer page here using your Airtel 3g sim ( Prefer having Small data pack to browse this page : 3gdongle.airtel.in
3. Click on “add alternate contact detail”
4. Enter OTP received via sms
5. Update your contact details.
6. Save and get Free 500 MB 3g Official Internet Data from airtel .
7. Free 3g internet data will be added soon to your account.
8. To check balance use “123*11#
– Offer valid for Airtel prepaid and retail postpaid customers
– For prepaid users, validity of free data is 7 Days.