Huawei Mate30 Pro User Manual page 102

Use VoLTE to Make Calls
Voice over LTE (VoLTE) is an IP-based data transmission technology that delivers both call
and data services over a 4G network.
Once VoLTE is enabled, you can make calls while accessing the Internet. If your phone
supports dual SIM dual VoLTE, you can receive an incoming call on a SIM card even when the
other SIM card is already on a call.
VoLTE also provides you with a faster call connection time and higher quality voice and video
calls.
Enable VoLTE
1
Contact your mobile carrier to activate the 4G and VoLTE functions for your SIM card. If
both the primary and secondary SIM card trays of a dual-SIM phone support 4G and
VoLTE, 4G and VoLTE can be enabled for both SIM cards.
2
Go to Settings > Mobile network > Mobile data. In the network settings area of SIM
1 or SIM 2, turn on the VoLTE calls switch.
Features may vary depending on your carrier.
Make a Video Call
Video calls are only possible when both parties are using VoLTE-activated devices.
1
Open Phone, touch the Contacts tab at the bottom of the screen, then select the
contact you want to call.
2
Touch to make a video call.
During a voice call, you can also touch
Use VoWiFi to Make Calls
The VoWiFi function enables you to make calls on a Wi-Fi network. You can even make
VoWiFi calls in Airplane mode.
1
This function requires support from your mobile carrier. Contact your carrier to activate
the VoWiFi function.
2
Go to Phone >
Manage Incoming Calls
You can use the call waiting feature to answer incoming calls when you are already engaged
in a previous call.
If you cannot answer a call because your phone is faulty or the network signal is poor, you
can also set call forwarding to forward calls to another number or device.
to switch to a video call.
> Settings > Wi-Fi Calling, then enable VoWiFi.
Apps
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