Just posting here so that readers get non-biased info.
Every private telecom operator in India (Jio, Vi, Airtel) has stopped outgoing calls and SMS without active packs. You can no longer use your balance for outgoing calls or sms..
Also all three above mentioned operators need a minimum recharge of ₹128 to enable outgoing SMS facility.
There're differences in the benefits offered but if you're looking to port out, it really doesn't make much difference.
Vi
₹129: 2Gb + 300 SMS. 24 days validity
Jio
₹127: 12Gb + 100/day SMS. 15 days validity
Airtel
₹129: 1Gb + 300 SMS. 24 days validity