The Channel name and bio must be no more than 255 characters long Read now 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. A new window will come up. Enter your channel name and bio. (See the character limits above.) Click “Create.” Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.”
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