How to create a business channel on Telegram? (Tutorial) Activate up to 20 bots 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. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel. The Channel name and bio must be no more than 255 characters long
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