Wi-Fi calling is a feature that allows users to make phone calls and send text messages over a Wi-Fi network instead of using a traditional cellular network. This is especially useful in areas with weak cellular signals, as it can improve call quality and reliability. To use Wi-Fi calling, you need a compatible smartphone and a Wi-Fi connection. Most major mobile carriers support this feature, and it can often be enabled in the phone's settings. When connected to Wi-Fi, your calls and messages are routed through the internet, making communication easier in challenging locations.