Vowifi not working on my jio sim while using BSNL in Archer MR600
I am not able to do proper call using Jio VoWiFi. First of all, VoWiFi doesn't appear automatically while connecting to Archer MR600. It appears when there is at least one signal bar in my phone. Once the VoWiFi appears, I can make calls but problem is that whenever I call someone, it rings and when the person receives the call, it disconnects. Further, if someone tries to call me when I am on VoWiFi, they complain that my phone is unreachable. Furthermore, outgoing and incoming SMS do not work either on VoWiFi mode.
I use iPhone 15 for my Jio sim. I checked my sim with an Android phone as well but the same problem persists in other phone also. I tried configuring DNS manually by setting it Google DNS (8.8.8.8, 8.8.4.4) as well but no luck.
I am using BSNL sim in the Archer MR600 router for internet so my ISP is BSNL in this case. The Speedtest shows 10 Mbps download and around 5 Mbps upload speeds.
Please provide solution to resolve this issue.
Thanks in advance