This functionality allows mobile devices running a specific operating system to make and receive calls and send texts over a wireless internet connection, provided by a particular telecommunications company. Instead of relying on the cellular network, the smartphone utilizes the internet to establish the communication channel. A user with a compatible device and service plan, when connected to WiFi, can experience improved call quality in areas with weak cellular signals, or even make calls where no cellular signal is available.
The advantages of using this technology include enhanced coverage in buildings or remote locations where cellular signals may be limited. It can also help reduce cellular data usage and avoid international roaming charges when connected to a wireless network abroad. Historically, this feature addressed the growing need for reliable communication in areas with inconsistent cellular infrastructure, evolving from a niche capability to a standard offering for modern smartphones and network providers.
