How to create a business channel on Telegram? (Tutorial) Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” How to Create a Private or Public Channel on Telegram? 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. ‘Ban’ on Telegram
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