How to Create a Private or Public Channel on Telegram? The optimal dimension of the avatar on Telegram is 512px by 512px, and itβs recommended to use PNG format to deliver an unpixelated avatar. A vandalised bank during the 2019 protest. File photo: May James/HKFP. 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. How to create a business channel on Telegram? (Tutorial)
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