Mate 30 User Guide-(TAS-L09&L29,EMUI10.1_01,en,4G)

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.
• This feature may vary depending on your carrier.
• The 4G network is used as an example here. If your device supports 5G, the operations
are the same.
• 5G services are only available in some countries and regions.
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 to switch to a video call.
Manage Data Usage
Open Optimizer, then touch Data usage to view data usage and manage network
access.
View and Manage High Data Consumption Apps
1 You can nd out how much data your apps are using in comparison to each other by
going to Data usage this month on the Data usage screen.
2 Touch a high data consumption app to set mobile data, roaming data, or background data
usage limits for it.
View and Set the Network Access Permission of an App
On the Data usage screen, touch Network access, then change the settings for apps that
consume a large amount of data (such as video streaming apps) so they can only be used
when you are connected to a Wi-Fi network.
Settings
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