WiFi calling on P20 Pro

[RyanONeill1970]

I see WiFi calling is supported on the P20 Pro according to the list of devices (https://www.o2.co.uk/business/support/network-support/wifi-and-4g-calling) and it has been rolled out for the P20 Pro ( 

https://community.o2.co.uk/t5/Android/Wifi-Calling-Coming-soon-to-Huawei-P20-amp-P20-Pro/m-p/1239080...).

I can't see the option to turn on WiFi calling though. I've delved deep into the phone settings as listed on here https://www.solvemix.com/index.php/en/year-2018/huawei-p20-pro-how-to-activate-wi-fi-calling-instruc... and that option is missing.

I do notice that although it has been rolled out for the P20, there are no instructions on how to activate it on the O2 site. Could I be missing a carrier update? How would I go about getting this pushed to the phone?

Not sure it is relevant, but we are on a BoostBox. My plan is to go over to wifi and turn off the BoostBox if the call quality improves.

[MI5]

@RyanONeill1970 

Ensure you have the latest firmware on your phone and if it's still not working you'll need to call customer service Guide: Coronavirus Community Help and Support 

[RyanONeill1970]

I was hoping to avoid calling, it's too busy even when this virus thing is not causing delays. Plus with the continual upsell every time I call...

Thanks though, I will call then.