The function allowing telephony over a wireless network on devices running the Android operating system presents an alternative to traditional cellular voice calls. This feature routes voice data through a Wi-Fi connection instead of relying solely on the mobile network. For instance, a user experiencing weak cellular coverage indoors could utilize a stable Wi-Fi connection to make and receive calls as if they were on the cellular network.
This capability is particularly valuable in areas with poor cellular reception but reliable Wi-Fi access, improving call quality and reliability. Furthermore, it can potentially reduce cellular data usage and associated costs, especially when making calls to numbers within the same calling area. Its implementation represents a shift towards leveraging internet-based infrastructure to supplement and enhance traditional mobile communication services. Historically, reliance on cellular networks was absolute; this technology provides a crucial alternative in areas with limited coverage.