Alternative messaging service Telegram has officially rolled out support for secure internet-based phone calls in Australia with its latest version (3.18) of the app.

The voice-call feature was introduced to Europe a little over a week ago, with the company . Now it’s delivered on that promise with the feature unlocking for Australian users of its apps overnight.

Telegram’s Calls feature is apparently built using the same custom end-to-end encryption that is found in its Secret Chats (an approach which has been ), although voice-chat will use a simplified verification system. Instead of a key-style verification seen in the service’s chats, both the caller and the recipient of the call will be presented with four emojis on-screen that they can verbally compare. If they all match, the .

The service will prioritise peer-to-peer connections for your calls, allowing for higher clarity audio signals, or will use  the company’s own server infrastructure if the apps are unable to establish a priority connection. Telegram is also hoping to use integrated AI to optimise this feature based on each individual user’s usage (and the company promises this’ll happen without collecting anything sensitive), such as improving the quality of calls on your specific network.

Telegram is for free, with mobile apps for iOS, Android, and Windows Phone, as well as desktop clients for Windows, Linux and macOS operating systems.

  • If Telegram isn't your thing, check out our top 10 secure messaging apps

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