How to Create a Private or Public Channel on Telegram? The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: 5Telegram Channel avatar size/dimensions In 2018, Telegram’s audience reached 200 million people, with 500,000 new users joining the messenger every day. It was launched for iOS on 14 August 2013 and Android on 20 October 2013.
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