In Dot OS some users have reported the same issue and reportedly manually locking to Band 3/5 in case of Jio and disabling B40 helps. Root is necessary. You can use Network Signal Guru or Cellular Pro(not available in Play Store).Hi..
Two days back I have installed V4.8-20210905-kenzo-Official-GApps.. I am facing issue of Volte. I have two sims Jio not showing Volte option. and other sim automatically switching Volte. Keeping one Jio sim working fine without Video calling "Jio to Jio".. But once i restart my mobile.. Then Volte not showing. only Internet service working.. Neither outgoing nor incoming.
I got an option of update. But Update downloaded 1.11GB out of 1.13GB and stoped. Please let me know how to solve this issue of network sim... Thanking you in advance
Thank you for reply... can't i solve this problem with out root..
I have installed Havoc 3.12. Volte working fine with Jio.. only Video cal not working.. I have install Phone (Google) and given permission of Camara.. but sitll unable to access camara in Video call