VPN (Virtual Private Network) creates an encrypted virtual tunnel over the internet, enhancing communication security and privacy. With VPN active, communication content is encrypted, making third-party interception extremely difficult.
Two main phone-related VPN uses exist. First, protecting communications on public Wi-Fi. Free Wi-Fi at cafes and airports is often unencrypted, risking interception. VPN enables safe VoIP calls and messaging even over free Wi-Fi.
Second, enterprise remote work. Accessing company PBX phone systems from home via VPN enables secure extension calls and internal system access. While cloud PBX increasingly enables VPN-free remote extensions, security-strict organizations still require VPN connections.
Free VPNs may be slow and some operators collect/sell user data. Paid services like NordVPN, ExpressVPN, and Surfshark offer speed, reliability, and no-log policies. See phone number privacy for related guidance.