The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. How to Create a Private or Public Channel on Telegram? Don’t publish new content at nighttime. Since not all users disable notifications for the night, you risk inadvertently disturbing them. How to build a private or public channel on Telegram? 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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