Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. With Bitcoin down 30% in the past week, some crypto traders have taken to Telegram to “voice” their feelings. 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.
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