Hi Daryll,
Ping is never the ideal tool to conclude if you're able to reach any given destination. Especially ICMP, this is quite common practice to block ICMP responses. I too am not able to "ping" the same host from AS135817 but Jio VoWIFI works just fine for me.
Maybe you want to do a tcp traceroute on the intended port number ( I'm not sure which port number is being used here for VoWiFi ). You'll surely find more useful information.
Thank you.
Rahul