I have seen many posts about network issue people facing in their S20 and S21 in Jio and airtel after june security patch ..
Let me tell you that problem has been fixed .. and Jio and airtel are only carrier companies in India which are giving network by your phone compatibility..so if you are facing issue's in jio and Airtel.
Ask them to make an Service Request from your side .. And VI is only company who's now Giving network same to everyone and their Volte is now rolling out .. If you don't see Volte option in network setting don't panic for airtel and jio .....
