I would like to inform you that VoLTE works in roaming (jio network, India) on 21 sept build and 5 oct build for me.
Although, initially VoLTE broke when I updated to 21 sept build.
I tried many things to fix it. I am listing everything that I tried in the most possible solution first.
•
Fix APN: Update the jio apn to match these
Code:
APN = jionet
APN type = default
APN protocol = IPv4/IPv6
APN roaming protocol = IPv4/IPv6
leave others.
I think APN type was initially = default, supl
which might have created problems.
Also add an ims apn:
Code:
Name = ims
APN = ims
APN type = ims
APN protocol = IPv4/IPv6
APN roaming protocol = IPv4/IPv6
•
Do a network reset:
Do a network reset then try the 1st method.
•
Change prefered network type to LTE
•
Reboot
I hope this fixes your VoLTE issues.
Enjoy this awesome Rom.