P40 Pro User Guide-(ELS-NX9,EMUI10.1_01,en-gb)

Set a Ringtone for a Contact
1 Open Phone, touch the Contacts tab at the bottom of the screen, then select the
contact you want to set a ringtone for.
2 On the contact details screen, touch Ringtone and select a ringtone.
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 a call while accessing the Internet. If your device
supports dual SIM dual VoLTE, you can receive an incoming call on a SIM card while the
other SIM card is being used for 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 device 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 is 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.
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.
Apps
110