Wi-Fi Calling, also known as Voice over Wi-Fi or VoWiFi, is a built-in function on most of today’s smartphones. Instead of using a cellular network, Wi-Fi Calling allows you to make and receive voice, text, and video calls via a Wi-Fi network.
Yes, Xiaomi Poco M4 5G supports the Wi-Fi calling features. Simply users can enable this feature from their phone’s settings and can make calls using Wi-Fi.