Xiaomi India — Volte not working in my resume note 3

Address:

180007

I recently bought a reliance Jio SIM card for my redmi note 3. But the VOLTE feature which is a must for calling is not functioning. I recently updated to miui 8.0.2 stable ROM. I have tried many things like setting up APN, turning off volte and then again turning it on, changing SIM slots etc. But still it's not working. Please provide some solution to this as lot o[censored]ses are experiencing this problem.