Family postpaid plans are basically multi sim postpaid(Bill vala) plan where customer gets one single bill for 2-5sim cards. Here data is pooled from same account and calls n sms are unlimited for now.

Comparison of postpaid family multi-sim plans from Airtel, Jio & Vi before march 2023.
AirtelJioVi
₹999
3 sim cards
100GB per month pool
rollover up to 200 GB
₹599
2 Sim Cards
100GB per month pool
rollover up to 200 GB
₹699
2 Sim Cards
40+40GB data
rollover up to 200 GB
₹1199
3 Sim Cards
150GB per month pool
rollover up to 200 GB
₹799
3 sim cards
150GB per month pool
rollover up to 200 GB
₹999
3 Sim Cards
140+40+40GB data
rollover up to 200 GB
₹1599
4 Sim Cards
250GB per month pool
rollover up to 200 GB
₹999
4 sim cards
200GB per month pool
rollover up to 200 GB
₹1299
5 Sim Cards
140+40+40+40+40GB data
rollover up to 200 GB
₹1699
3 Sim Cards
Unlimited data per month
₹2299
5 Sim Cards
Unlimited data per month
2p per MB overage₹10 per GB overage2p per MB overage

All the 4G operators offer OTT app subscription for initial 1/3/6/12months period depending on plan and app with lot of t&cs so read in details before getting lured. OTT streaming apps like Amazon Prime, Hotstar, Netflix, Zee5, Sonyliv, Voot, Altbalaji etc.

Only Vi offers complete unlimited 4G plans though their tncs says no commercial usage so kind of unlimited however don’t misuse it as connection can be terminated.

Bsnl doesn’t offers multi sim plan and not being pan India(missing in Mumbai & Delhi) we excluded from this comparison.