Airtel offer 1gb 4G data for all 4G SIM user. Just give a missed call & avail this offer. This offer for selected state only. Just follow below steps & grab this offer if this offer working on your state. So try it.
Get 1GB Free 4G Data From Airtel
1. First give a missed call to 52122
2. You'll get conformation sms if you eligible for this offer
3. Check your data balance dialing *129*08#