Airtel is giving away full talktime in Rs.260 recharge along with 1GB , 2GB or 3GB data. This data can be carried forward, use in family share plan and eligible for night free data. All in all this extra data is core like data not promo one. So this recharge is very beneficial if you like to accumulate data by carrying it forward with in-time recharge.
This offer is very good for users who talk too little and this talktime can be used in future for some data recharge.
Airtel was giving away 6GB data before however that offer seem to be closed now. Seem like too many user took the plunge in that offer as seriously the offer was way too generous.