5Telegram Channel avatar size/dimensions 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. End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance. How to create a business channel on Telegram? (Tutorial) To delete a channel with over 1,000 subscribers, you need to contact user support
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