This is Sandeep and I bought Nokia 6 last year. I am using Jio 4G LTE Sim and I was able to make calls on VOLTE Network as well as on WiFi. Now, there were few upgrades in between and I cannot make calls on WiFi anymore (in fact my number becomes "switched off" when WiFi is on!). But when I switch off WiFi, I see the VOLTE Symbol on and I can make calls then. What do i do?