I'm in the same boat with the same phone. I think it was with Optus originally, but will need to confirm that. I thought i had nothing to worry about as the phone is listed by TPG as supported for this transition. I followed several TPG tutorials, during which the options presented were always stated a little vaguely, as Volte/4G. I did check to be sure, and my phone has an option to change Network Mode to "4G/3G/2G (auto connect)".
It's set to that, and i have restarted the phone, but it can't make or receive calls (i haven't tried 000).
how do i change Sim settings like you mention? Google brings up nothing, and on the phone itself i can only view SIM settings, not change them. Not that anything like LTE/4G is listed there.
My phone says its last software update was 8/9/21, which was coincidentally also the last time it checked for updates. So... EoL? Who tested this model at TPG to be sure it worked? Thanks.
EDIT: I note that when i turn off my wifi connection, the phone says it is connected to 4G. And also that there is an option in the pulldown menu called wifi-calling, but it sits half-on. Light blue not fully blue, like it cannot activate.
