4g Calling Enabled but no 4g Calls

[Bychan1970]

Pay monthly SIM using an Oppo Find X3 Lite. 4g calling is enabled by O2 and also activated in the MyO2 app. The setting also appears on the mobile, and has been enabled (as has WiFi calling).

Switch WiFi off and make a call (with full 4g signal), and nothing appears on the mobile to indicate that the call is made over 4g. On an older mobile on EE for example, Volte was displayed top right. On this same mobile, when used with a Voxi SIM (i.e. Vodafone), HD appeared next to the calls made in the phone app.

So it would seem that this isn't working as it should?

Thanks 🤔

[MI5]

@Bychan1970 

Means nothing.

O2 don't have a symbol for it. Mine just displays 4g as normal.

[madasaf1sh]

@Bychan1970 

Some of my test phones dont show VoLTE any more, so think its been removed from some handsets as its now a default feature.. 

my Pixel 7 Pro and 6 Pro (o2 and EE) doesn't show it anymore.. but 4G remains on the screen whilst a call is in progress. 

[Enlli]

If it's not working the phone will drop to 3G. So if your calling with 4G displayed then it's working 

[Bychan1970]

Thanks all