The capacity to conduct telephone calls over a Wi-Fi network when a cellular signal is weak or unavailable is a feature integrated into Apple’s mobile operating system. It effectively routes voice data through a wireless internet connection rather than the traditional cellular network. For example, in locations with poor cellular coverage but robust Wi-Fi, such as basements or rural areas, this functionality enables users to maintain communication.
This capability offers several key advantages. It enhances call reliability in areas with limited cellular infrastructure. Furthermore, it can potentially reduce cellular data consumption, especially when users are connected to unlimited Wi-Fi networks. The introduction of this feature significantly broadened the accessibility of voice communication on Apple devices, offering a supplemental pathway for connectivity.
