6How to manage your Telegram channel? The best encrypted messaging apps 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? The court said the defendant had also incited people to commit public nuisance, with messages calling on them to take part in rallies and demonstrations including at Hong Kong International Airport, to block roads and to paralyse the public transportation system. Various forms of protest promoted on the messaging platform included general strikes, lunchtime protests and silent sit-ins.
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