Very TRUE. Jio need to correct them, both are very very important.
In my place, performance of Jio has increased to mind-blowing levels. We are using Jio mainly for data, as almost all of my family members are using Airtel's infinity postpaid plans (Thanks to JIO) for voice calls. Speed of Airtel has reduced to 10Mbps (which is still NOT bad, comparing 3Mbps of Vodafone, 0.3Mbps of BSNL) from earlier 20+Mbps speed. But Jio speed is great around 26 to 35Mbps (speed varies by time of course).
We already have good Local broadband provider with 3Mbps unlimited -- a very reliable connection and JioLink with 4GB per day, which is also working great. The backup BSNL BB connection was closed as its the most un-reliable one. I have recharged my family members' 3 Jio numbers with Rs999 on March itself, all those have got 100GB FREE usage for 3 months without any daily limit, we find it very hard to exhaust them. Few years ago, we don't had any reliable BB connection, even if we are ready to spend upto Rs3k to 5k per month. But now, we are spoiled with choices, all thanks to Jio.
Even wrt voice calls, Jio is good enough, except to Bull $hit Nigam Limited LandLine calls. But we rarely use Jio for voice calls, as Airtel was super generous and succeeded in retaining us. I used to pay Rs1599 + Taxes to Airtel to get 10,000 minutes (incl roaming) + 8GB of 3G/4G data. Now I am paying just Rs649 for unlimited calls (incl roaming) and 21GB of data. My other family members are paying Rs349 for Unlimited calls (incoming roaming FREE) and 11GB of data. Further HD Voice calls in Airtel (on its DC-HSPA network -- 10MHz 3G) network is equal or better than VoLTE calls of Jio, imho. Yes, calls to most numbers (especially Airtel) connect instantly, like Jio 2 Jio calls. But in roaming, normal voice calls on Airtel 3G (5MHz 3G) is good-enough only as its NOT HD, like DC-HSPA of TN.
I know Jio is the reason for Airtel's new found love for its customers. So thanks to Jio. I am waiting for Jio's VoLTE button-phone. Without that I can't move all my Corp connections to Jio, even if I want to.