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To edit your name or bio, click the Menu icon and select “Manage Channel.” Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” 3How to create a Telegram channel? Informative 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.
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