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.

[KevinJacobBiju]

If it's persisting like this, maybe it's problem from Jio side or maybe antenna problem in S21FE.

[datahungryperson]

Currently in the process of porting to Airtel, if issue exists there as well then I'm sure it's device's fault. Or else it's Jio specific to my area. I already have a Vodafone SIM and VoLTE working perfectly fine.

[KevinJacobBiju]

Ok.

[JerinJohn]

Try power off your phone and on it

[datahungryperson]

Hi, tried it, also, swapped the sims into different slots. Issue remained the same.

[JerinJohn]

Restart your phone

[datahungryperson]

Tried restarting, issue persists

[KEDYY]

yes its true, not oftenly but i am also facing this issue once or twice in a month

[Kaushik566]

Im facing the same issue with jio or airtel both networks in galaxy s22 volte icon suddenly disappeared

[nbbbbbbb]

https://r2.community.samsung.com/t5/Galaxy-Fold/Jio-5g-Error-in-Fold-3-5g/td-p/13400699