Wi-Fi calling, also known as VoWiFi, lets phones make calls and send texts over a Wi-Fi network instead of a cellular network. It routes traffic through an encrypted tunnel to the carrier, so the person on the other end does not need the feature enabled. For employees working in buildings with weak cellular signals, this can be a practical alternative to dropped calls and dead zones.
The main benefit is coverage in areas where cellular signals struggle, along with noticeably better audio quality when the Wi-Fi connection is strong. However, call quality depends entirely on the network. Congestion can cause choppy audio, lag, or dropped calls. Carriers such as T-Mobile require at least 2 Mbps upload and download speeds, and T-Mobile does not support Wi-Fi calling over satellite internet or phone hotspots.
There are also limitations. The handover to cellular when leaving Wi-Fi coverage is not always seamless and requires VoLTE to work. Emergency calls are routed over Wi-Fi only when no cellular network is available, so a Wi-Fi outage could leave a caller without a connection. Security depends on how well carriers and chipmakers implement the encrypted tunnel; a 2024 study found vulnerabilities affecting millions of customers, though patches have been issued.
For businesses, enabling Wi-Fi calling is a simple setting on most phones, but it is not a substitute for a solid network. Companies should ensure employees have reliable Wi-Fi and keep devices updated. The feature can be turned off easily if it causes more problems than it solves.