For a long time like 4 years I used 399/444 vouchers.
Currently 1299_336Days_24GB and UL 5G active. After that 1559 vouchers will start. Before that was using 399/444_84 Days vouchers bought in 2019 at 349/394 with Rs.50 discount coupns Jio offered (If you remember with 399 recharge Jio used to provide Rs.50 X8 discount coupons which we can apply either on recharge or vouchers).
Voucher kitty currently on personal Number.
1. Rs.149 - 20 Days - 1.5GB/Day Qty Left: 1
2. Rs.395 - 84 Days - 6GB Qty Left: 4
3. Rs.399 - 84 Days - 1.5GB/day Qty Left: 1
4. Rs.555 - 84 Days - 1.5GB/day Qty Left: 8
5. Rs.599 - 84 Days - 2GB/Day Qty Left: 7
6. Rs.1559 - 336 Days - 24GB Qty Left: 3
7. Rs. 2399 - 365 Days - 2GB/Day Qty Left: 1
8. Rs. 2545 - 336 Days - 1.5GB/Day Qty Left: 1
9. Rs. 2999 - 365 Days - 2.5GB/Day Qty Left: 2
All the above old recharges and vouchers continue to provide UL 5G. Recently did 395 vouchers recharge to my father's number and UL 5G added in 20 hrs. With older vouchers they credit UL 5G add-on in 20-36 hrs while with new ones it is instantly credited like with 2545 and 2999.
Already family numbers having 15-30 months left on different numbers with recharges already stacked up.
More or less this investment has reaped better result due to nearly 100% hike in tariffs. Even if tariff reduces which has lesser chances as it can stablize but won't reduce much, these will recover my cost.