Wi-fi-calling is a service that allows users to make and receive phone calls and send text messages over a Wi-FiWi-Fi is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for wireless networking and allow nearby devices to exchange data by radio waves. Wireless local area networks (WLAN) are widely used in the world to link laptop computers, tablet co... READ MORE connection, instead of using a cellular signal: