How to make Telegram group voice calls

Coping up with the ongoing pandemic several instant messaging platforms like Zoom, Skype, Meet, Hangout, etc made some amendments to their services to offer better video and voice calling facilities. Telegram, on the other hand, introduced one-on-one calling feature back in August and now, the company has started rolling out group video calling to the beta version of the app.
So, if you are a Telegram beta user and want to give this feature a try, here’s how you can do it.
Pre-requisites:
Ensure to install the latest beta version of the Telegram app
Working internet connection with good speed
Also, note that currently the option to make group voice calls are limited to admins only.