Primary :- Airtel Corporate Postpaid is little costly, but still totally worth it, imho. Rs249/- with UL calls, 100SMS/day, 30GB data upto 200GB Roll-over. Earlier was on Rs149 -- 10GB data, upto 200GB roll-over. Changed to current plan, as 10GB is too small, for few family members.
Secondary:- Jio Prepaid Number having some 125+ mixed vouchers of Rs399 (1.5GB/day 84 days), Rs448 (2GB/day 84 days), Rs299 (3GB/day, 28 days), etc.. All those vouchers are bought with Rs50 discount vouchers (Got 8 numbers of Rs50 vouchers by recharging each of Rs399 [total 16xRs399 recharges] done in Nov 2017). So Actual cost of Rs399 is
Rs349 with UL calls incl non-Jio, 1.5GB daily data, 84 days, Rs299-->
Rs249 UL calls incl non-Jio, 3GB/day, 28 days [Rs50 voucher was allowed to be applied, when doing combined recharge of Rs299+Rs98] and Rs448 -->
Rs398 UL calls incl non-Jio, 2GB/day, 84 days. All these vouchers are shared with my 7 family members. No worry of tariff hike or off-net call charges for 5 years min (4 years remaining) for each of the numbers.
Tertiary:- Idea Prepaid number : UL Calls, 100SMS/Day, 1.5GB/day data, valid till Jan2023 (recharged on Nov2019, before tariff hike). I know, VoId is in bad shape. But if Ambani deserves Rs50k from me (Jio recharges above), Rs5k is a fair amount for Birla, isn't it? Further considering Spectrum payment moratorium, (AGR as well) VoId may live upto 2022 end.
If may look like, I am spending a lot of money per month. But the actual value is Rs249 (Airtel) + Rs125 (Jio) + Rs140 (Idea) = Rs514 (incl GST, as I get GST refund in my Corp connection) per month. Comparing my pre-Jio tariff plan of Solitaire 1599+15% Tax in Airtel (8GB data, 10k mins incl roaming, roaming SMS chargeable), my current usage is more than 3.5 times cheaper, with 2 backup numbers.