@Taleya
The Apple Store told me the telcos would be unlikely to upgrade 4g and would probably redeploy the 3G resources to 5G.
My phone does support VoLTE but the Optus infrastructure is crap. It used to drop to 3G calls but no longer. Now it just drops out completely.
I guess it doesn’t matter now because the telcos have realised half of rural Australia would be left with no service and that would be very bad.
@Taleya Yeah, that’s what I’ve learned. Shitty infrastructure and no intention to improve it.