I used a Samsung A50 before and has been able to use Wi-Fi call feature. I have a sim from Malaysia and I can use both Malaysia and Aussie number if I'm on Wi-Fi. I can use my Malaysia sim Card (without rooming) on my old A50 and Optus's 1$ Nubia Focus 5G. My S24 was able to show the Wi-Fi called was ok one time but never worked anymore. Any idea how can I get the Wi-Fi call feature to work?
If your using 2 Sims there is seperate config (for Volte, data, messages & calls) for each. Make sure you have them all setup correctly. Also check that your not using the SIM forwarding feature when setting these up.
When you pull down from the top, possibly twice you get Calls, Messages and Mobile data. Tap on one of them. For Messages and Mobile data you only get the choice of Sim1 or Sim2. For calls you get the additional option of Ask always. Are you using that to choose which network to choose for wi-fi calling? Mind you you might have to do this in data as that is where wi-fi calling is used.
Another option is at the ISP end. When I upgraded a call only sim to call and data I also changed the phone number. Thus the automatic change to my sim didn't occur. I had to get Amaysim to delete the settings and to reset my sim to overcome this. I am suggesting here that the settings have defaulted to the old settings after the one time success.
Another option is when an upgrade occurs the old cache data interferes with the update. To fix this you need to clear the phone cache (at the same time clearing the "Google Play service" cache). Then restart. You will lose the phone cache settings so make sure you have things like phone numbers backed up.
