I know that there was a thread about this last year, but can't find anything more recent so thought I would see if there is more info out there.
Had my Samsung A71 last June and I have read that only a purple sim will work. The sim card that I have has a white background with a purple section that contains the red Virgin logo. I have looked at the device list (https://www.virginmedia.com/help/mobile/wifi-and-4g-calling) which states that the A71 is compatible with WiFi calling. The phone is currently on Android 11.
I see no options to turn WiFi calling on, and I do not get the WiFi Call icon to show that it is working. Does this mean that I need a replacement (different) sim card to get it to work or is it that it will not work and the Virgin device list is totally wrong.