Wi-Fi Calling vs. VoIP
The foundation of Wi-Fi Calling is Voice over Internet Protocol (VoIP), the same technology that powers Skype, WhatsApp, Google Meet, and other commercial services. The key difference is that Wi-Fi Calling does not require a separate app — it only needs to be enabled in the smartphone’s settings.
How Wi-Fi Calling Works
When Wi-Fi Calling is enabled, the smartphone automatically determines the strongest available network at the time of the call. A call will be routed over Wi-Fi only if the Wi-Fi signal is stronger than that of the mobile operator’s cellular network.
The main advantage of Wi-Fi Calling is that it provides a free backup communication channel in case of cellular signal loss. However, its main drawback is the instability of the signal in public areas, as network bandwidth is shared among users, which can negatively affect call quality.
