This is why, I hate this Stupid Company. They can easily bring better plans usable for common man, like slightly costlier than BSNL and much much cheaper than Airtel / Jio. But NO, they are simply following their Master "The Devil Airtel" like the old Hutch Dog.
Airtel / Jio has the luxury of being many people's primary number, which VoId lacks badly. VoId should compete with BSNL for secondary SIM status. Following Airtel and neglecting low income people will NEVER help them in the long run.
With each and every tariff hike, more and more middle class people are killing their secondary number. There is a great market available for secondary SIM with cheaper tariff, which only Airtel has the luxury to ignore (even Jio has JioPhone plans to cater them). VoId ignoring that market is outright stupid for their survival, imho.