Wifi calling. Not working on 2 different phones on 02

[Rhcomp]

Hi, we have three phones, two on 02 and EE, all Samsung 

The Samsung S20+ and A50 Android 11 on02 won't work wifi all switched are on and preferred. 

The S9  Android 10 is on EE that has the same setting as the other two phones

We have no mobile signal where we live, so wifi calling is a lifeline Help.

Thanks in advance 

Chris

[Cleoriff]

@Rhcomp  You need to call O2 to activate it first and then you turn it on in My O2

[Rhcomp]

Thanks for reply we  have wifi calling from  02 on the  both the accounts  we both have had working to a Samsung upgrade on the phones  🤬

Just check my o2  wifi and 4g calling is on.