Samsung Galaxy S21 FE VoLTE Issue with Jio

[datahungryperson]

Hi all, I have Jio as my primary carrier and Samsung Galaxy S21 FE 5G (Exynos Version). The VoLTE icon usually disappers randomly and I am unable to recieve any calls. The caller hears that I am either out of reach or in another call, which isn't the case. Once I toggle airplane mode on and off, VoLTE reappears for a brief moment of time and then disappears. Do note I can access data normally, usually with a sign on LTE+ (2CC,3CC,4CC). 

Enabling WiFi calling is another mess, have tried that too, same issue, VoWIFI doesn't work as well.

Jio Customer care opened a SRN and treated it like an open shut case stating we are improving our coverage.

Has anyone faced this issue or Does anyone know why this is happening? Does the problem lie with Jio tower in my area? Or is there a bug in the Samsung Device?

Thanks!

Edit: 

Update: I ported into Airtel from Jio, and the experience on Airtel is good. (In my hometown).

Do note that before porting, I travelled extensively in Bangalore, and Jio worked fine too. It is only when I come back to my hometown this issue reappeared. My coverage of Jio in my hometown is not bad, usually around -90dBm to -92dBm, so I am sure Indoor coverage is fine, but the specific tower my phone latched to had a problem. Anyways, Airtel is flawless. Will update if and only if any issue arises again.

[ImMaheshS]

I haven't faced this issue..I can constantly see VoLTE icon..and wifi calling is working fine ..it looks to be jio network issue

[datahungryperson]

Thinking the same because Vodafone VoLTE never died even once.

[Kira255]

Facing this same issue with Vodafone VoLTE on my S21 FE

[datahungryperson]

Which sim slot did you face the issue? Primary or Secondary?

[Kira255]

I tried in both, i was thinking to port in Jio
But then saw this post today
So i think its a software issue.

[datahungryperson]

Maybe, but I'm porting out to Airtel

[Kira255]

Please share you experience after trying airtel.

[KevinJacobBiju]

Maybe network issue. Try going to a better coverage area and check whether it happens or not.

I'm using Jio in S21FE. Haven't seen this type of issue.

[datahungryperson]

It does happen, no luck, when I go to the terrace i get direct Line of Sight from Jio Tower (source : tarangsanchar website)