VoLTE and preferred WiFi calling - S21U

[RodderENG]

If I turn VoLTE on, I don't get the icon in the top tray to show this?

On either sim, ones Vodafone, ones O2

If I got WiFi calling, I can only set 'preferred' on the O2 SIM, not the Vodafone SIM?

If I go into airplane mode and turn WiFi on, both sims show WiFi calling.

[ynneL]

The only network that shows the VoLTE logo on Samsung is EE and only EE and O2 allow you to prefer WiFi over cellular for WiFi calling

[RodderENG]

Thanks for the info, but Vodafone will use VoLTE eventbough it doesn't show?

[ynneL]

Yes I have both an EE and Vodafone SIM and VoLTE still works on my Vodafone SIM even though I can't toggle it on or off it's on by default

[ynneL]

SIM 1 is EE and SIM 2 is Vodafone I can only toggle VoLTE on my EE SIM but VoLTE works on Vodafone without issue

[RodderENG]

I can toggle both, how do you know you're on VoLTE?
Just curious, it's nice to know your using features you're paying for!