Devices running Google’s operating system that are capable of utilizing a wireless network to make and receive telephone calls are now commonplace. This functionality circumvents the traditional cellular network under certain circumstances, offering an alternative communication method. An example is a user making a phone call at home where cellular signal is weak, but a strong Wi-Fi connection is available.
The importance of this capability lies in enhanced call quality in areas with poor cellular coverage, cost savings by reducing reliance on cellular minutes (especially when abroad), and accessibility for users in areas where a cellular signal is unavailable. Its emergence has been driven by advancements in Voice over Internet Protocol (VoIP) technology and the increasing availability of broadband internet access. This feature has significantly broadened access to reliable communication for users worldwide.