Use Vowi-Fi For A New Calling Experience - Huawei P30 lite User Manual

Enable VoLTE to Enjoy HD Calls
Some carriers may not support this feature.
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Only dual-SIM phones support both SIM card slots enabling 4G, VoLTE, and VoWiFi.
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Open Settings, and go to Wireless & networks > Mobile network. In the settings section for
SIM 1 or 2 (if supported by your carrier network), you can:
Enable 4G: Turn on 4G. The 4G switch may be unavailable for your device due to your carrier's
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settings. This indicates that the 4G network is enabled by default.
Enable VoLTE calling: Turn on VoLTE HD calls.
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Enable Wi-Fi calling: Turn on Wi-Fi calling.
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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 network reception.
This feature must be supported by your carrier. Contact your carrier for more information,
including fees and charges.
Open Dialer, go to
follow the onscreen instructions to set the preferred network.
> Settings > Wi-Fi calling, enable Wi-Fi calling. Touch Mode and
Dialing
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