So this is NOT tariff plan for family, but Plan to FAMILY PLANNING for all customers...LOL
Their regular myPlan 799 has 40 FREE packs.
Family plan 799pack has 35 FREE packs
So after paying for total 4 persons = 799+99+99+99=1100Rs.
I still get 35 packs only and that too for 1100Rs!
Great logic by Airtel.