Use Vowi-Fi For A New Calling Experience - Huawei Mate 20X 5G User Manual

Use VoLTE on a 4G network
1
Contact your network provider to enable the 4G and VoLTE services.
2
Go to Settings > Wireless & networks > Mobile network, then enable 4G and VoLTE calls
for SIM 1 and SIM 2 as required.
The 4G switch may be unavailable for your device due to your network provider's settings. This
indicates that the 4G network is enabled by default.
Make a VoLTE video call
1
Ensure that both devices support the VoLTE service and have it enabled.
2
If a 5G network is connected, enable 5G. If a 4G network is connected, enable 4G and VoLTE
calls.
3
Select the contact you want to call and touch
during a voice call to switch to a video call.

Use VoWi-Fi for a New Calling Experience

You can use VoWi-Fi to make voice and video calls in any location that has a Wi-Fi network, even
when there is no mobile Phone network reception.
This feature must be supported by your carrier. Contact your carrier for more information,
including fees and charges.
Open Dialler, go to
follow the onscreen instructions to set the preferred network.
> Settings > Wi-Fi calling, enable Wi-Fi calling. Touch Mode and
to make a video call. You can also touch
Dialling
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