How to create a business channel on Telegram? (Tutorial) With Bitcoin down 30% in the past week, some crypto traders have taken to Telegram to “voice” their feelings. 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. "Doxxing content is forbidden on Telegram and our moderators routinely remove such content from around the world," said a spokesman for the messaging app, Remi Vaughn. The Channel name and bio must be no more than 255 characters long
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