Mate 20 Pro User Guide-(LYA-L09&L29,01,EN)

l Dual V
oWiFi: Both of your Phone's SIM card slots support VoWiFi, which allows calls to be made
using Wi-Fi. You can use VoWiFi to make calls even in Airplane mode.
Some carriers may not support this feature.
Enable VoLTE to Enjoy HD Calls
l Some carriers may not support this featur
e.
l Only dual-SIM phones support both SIM card slots enabling 4G, VoLTE, and VoWiFi.
Open
Settings, and go to W
ireless & networks > Mobile network. In the settings section for
SIM 1 or 2 (if supported by your carrier network), you can:
l Enable 4G: Turn on 4G. Due to carrier customization, there may not be a 4G switch on your
device. This indicates 4G is already enabled and does not need to be turned on manually.
l Enable VoLTE calling: Turn on VoLTE calls.
l Enable Wi-Fi calling: Turn on Wi-Fi calling.
After the setting is complete, select the contact you want to call and touch
to make a video call.
Y
ou can also touch
on the screen during a voice call to switch to a video call.
Use V
oWi-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 network reception.
This feature must be supported by your carrier. Contact your carrier for more information,
including fees and char
ges.
Open
Dialer, go to > Settings > W
i-Fi calling, enable Wi-Fi calling. Touch Mode and
follow the onscreen instructions to set the preferred network.
Dialing
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