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To enable calls to the Telegram you need to install the latest Beta version of Telegram for Android.
Facetime audio in the Telegram is already available to those users who have installed the beta version of messenger. On the test server, created some groups in which you can ask to call you and to check the quality of communication, according to the developers of the messenger in his telegram channel.
To enable calls to the Telegram you need to install the latest Beta version of Telegram for Android, click Switch the Backend in the settings, and then register on the server. Only then can you test the new function.
“Go, tell him to call you and leave the chat to give the opportunity to join others limit the Dark groups in Telegram 20. If you want to return to normal mode, again go to settings and tap Switch Backend”, – say the developers of the application .