The ability to disable the feature that routes calls over a wireless internet connection on a device running the Android operating system is a common user request. This functionality exists to provide control over network usage and calling preferences.
Deactivating this setting can be important for individuals seeking to conserve data when not connected to a Wi-Fi network. It can also improve call quality in situations where the wireless internet connection is unstable. Historically, this setting was introduced to address issues with cellular network coverage and provide an alternative method for making and receiving calls.