Airtel another offer for selected few. Get 3GB daily data + unlimited free calls to anyphone in India for 28days in just ₹399.
84GB inRs.399 comes to 4.75₹ per GB of data with complimentary free local n std calls.
To get this offer check *121# and follow best offer options.
Outgoing roaming calls can be made free by using ₹52 roam like home STV.
Jio doesn’t has any 3GB per day offer like this. Though again Airtel offer is not for everyone.
Jio closest offer is 2GB per day for 56days in ₹509 only i.e. 4.54 per GB which even lower than the Airtel offer.
Bsnl is the cheapest with ₹333 for 3GB per day data for 90days. However drawback of Bsnl is no 4G network & zero free calls.