Bit off topic..but after I closed my Airtel internet, they said they will collect the
router. A guy came to whom I handed over the router but I ensured that I get the receipt from him.
It's been more than 6 months but still I get an SMS that
you have not yet returned the router, we will be happy to collect it from you.
I escalated to
net@airtel.com but nothing helped the msg still comes, just that now no one has come to my doors.
When I bought Airtel internet, they asked me to go thru one terms and conditions document and got my sign on it and gave me a countercopy of that. It very clearly stated that public ip will be assigned subject to availability.
After a few years they moved to CGNAT as IPs were less and less and now I cannot complain because it is as per those terms and conditions.
If they have never given you a signed copy of terms and conditions, or if they have never shared any such document with you in digital form, you have no obligation to return the STB. I guess ironically the carton box of Airtel DTH STB says it's the property of Airtel (as per YT videos)
Even some YT videos highlight this concern that Airtel DTH forces you to return the STB if you don't recharge it for over 3 months.
Airtel has no values in first place.