How Wi-Fi Calling Works: Benefits, Limitations, and Security

Wi-Fi calling routes calls and texts over a Wi-Fi network instead of the carrier's cellular network, and this breakdown explains how it works and whether it is worth enabling. It covers the underlying mechanism, the main advantages, the practical limitations, and the security considerations, with concrete examples such as building materials that weaken signal and carrier-specific requirements.

■ How Wi-Fi calling works
- The technical path a call takes and why the other device does not need the feature enabled
■ Advantages
- Making and receiving calls in areas with little or no cellular coverage
- Improved call quality compared with cellular networks
- Ease of use, cost on most carriers, and automatic fallback to cellular
■ Limitations and requirements
- Dependence on Wi-Fi network quality, including carrier minimum speed and hotspot/satellite restrictions
- Call handover between Wi-Fi and cellular, the role of VoLTE, and the handling of emergency calls
■ Security
- Encryption of Wi-Fi calls, a 2024 study on vulnerabilities affecting customers in several countries, and the importance of keeping devices updated

It is aimed at Android and iPhone users who want to decide whether to turn the feature on. Viewers can expect to understand the trade-offs involved and to check their own carrier's requirements before relying on Wi-Fi calling.