So with Telstra shutting down 3G, my Xperia will not make calls on a 4g connection with them as they block volte for my phone.
I just tested an Amaysim connection (Optus) and that works fine over volte with my phone. So I am looking for a cheap plan from an Optus reseller, I haven't tried Vodafone yet but I believe theirs works but can't confirm just yet.
It can have minimum data but I would like unlimited calls/txt as it is my primary number but I have a work eSim I use for data. Is this basically my best option to set and forget, as I don't want to SIM hop.
This plan would be perfect for your situation.
That deal was marked as expired but the plan is still being offered by Amaysim.