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Activate up to 20 bots 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. 2How to set up a Telegram channel? (A step-by-step tutorial) 5Telegram Channel avatar size/dimensions
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