Hey everyone - it looks like Coles Mobile is finally starting to roll out VoLTE:
How do I get VoLTE?
1. Check that your device is a VoLTE compatible device.
2. Turn on 4G/ VoLTE setting on device network settings.
VoLTE will be available to new customers who activate from the 4/8/2022 and progressively rolling out to existing customers.
Source: https://colesmobile.com.au/home/page/get-volte
Noice. Will they get 5g as well?