4How to customize a Telegram channel? 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. Telegram Channels requirements & features The Standard Channel Ng, who had pleaded not guilty to all charges, had been detained for more than 20 months. His channel was said to have contained around 120 messages and photos that incited others to vandalise pro-government shops and commit criminal damage targeting police stations.
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