Huawei P30 Pro User Guide - Page 49
Enable VoLTE to Enjoy HD Calls, Use VoWi-Fi for a New Calling Experience
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Enable VoLTE to Enjoy HD Calls l Some network providers may not support this feature. l Only dual-SIM phones support both SIM card slots enabling 4G, VoLTE, and VoWiFi. Dialling Open Settings, and go to Wireless & networks > Mobile network. In the settings section for SIM 1 or 2 (if supported by your network provider), you can: l Enable 4G: Turn on 4G. 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. 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. You can also touch on the screen 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 Phone, go to > Settings > Wi-Fi calling, enable Wi-Fi calling. Touch Mode and follow the onscreen instructions to set the preferred network. 45