ShubhojitGetting Volte from day 1 no issues !
I am seeing lots of thread regarding volte not working on airtel please follow the below steps to make it work
Put your sim in one of the supported handsets from airtel.in/volte then call customer care about volte not available once you see volte in the supported device remove it from that device and put that in your device .
Use above trick you will definitely get volte for airtel
[Solution] Volte not working on Airtel [India Only]