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I have a JIO sim on my second phone. It works for six months without recharge; I mean, incoming SMS & calls. It is still working, but I have never used an INR 10 recharge. My elder friends/collegues have told me that there was a time in India when INR 10 was enough to get a liter of petrol. That shows how inflation has depreciated the INR & why Bitcoin was created.
Are you sure that you will not lose your SIM if you do not recharge it for more than three months? I will try to see next time around whether incoming calls remain available, as I had no idea that was possible with a Jio SIM past the regular grace period.
Regarding the price of petrol and diesel, during the early '90s, it was below 10 rupees. When I owned my first vehicle, the price of petrol was around 26 rupees and diesel was around 18 rupees. During my college days, I used to travel a lot, and filling up petrol or diesel would not hurt your pocket much. But now, you can feel the difference even on short trips. I actually sympathize with the current generation of youngsters, as they cannot have that care free life unless their parents give them good pocket money.
Even I thought that the grace period to keep the sim under our name is only about 3 months post which the registration is deactivated and in some days the number gets allotted to some other person.
I had faced a similar situation with my previous number, not sure for how many months it was idle but it was long enough for sure, then it got transferred to someone else but my sim was Airtel.
Anyway, I didn't use that number much and so I was fine with that but sometimes I feel that paying money just to keep the sim under our name feels like paying ransom.