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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. 4How to customize a Telegram channel? Those being doxxed include outgoing Chief Executive Carrie Lam Cheng Yuet-ngor, Chung and police assistant commissioner Joe Chan Tung, who heads police's cyber security and technology crime bureau. 5Telegram Channel avatar size/dimensions End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance.
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