Not working for me. My home circle is Maharashtra and Goa and current circle is Karnataka. I tried to raise a complaint with the customer care and they are like their back-end team is working on the issue, they cannot take a complaint regarding it. No concrete resolution for the issue. I tried Airtel Karnataka SIM, VoWiFi was available even without any recharge pack on it. Don't know how to get this working. In my area the cell reception is very bad for indoor coverage.