I understand that Virgin now have wifi calling and my wife has a oomph sim contract with them but I can't find how to set this up on the Huawei P20 Pro. I could really do with being able to set this up as the signal is rubbish in the house.
All of these devices support 4G Calling if they are bought directly from us. If you are using a device that was bought from another network, or SIM free, we cannot guarantee that it will support our 4G Calling service. If your supported device doesn’t have the 4G Calling option available, make sure you have updated the software to the latest version and reboot your device.
If your device isn’t supported yet, don’t worry, we’ll be adding 4G Calling to more devices soon.
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Think I've been through just about every setting on her phone, I'm sure it's activated via the SIM card because the phone used to be mine and was an option within the settings when I had it with a Three contract. As usual Virgin are way behind any other providers.