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To edit your name or bio, click the Menu icon and select “Manage Channel.” How to create a business channel on Telegram? (Tutorial) 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. It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS): The Channel name and bio must be no more than 255 characters long
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