To delete a channel with over 1,000 subscribers, you need to contact user support 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. With Bitcoin down 30% in the past week, some crypto traders have taken to Telegram to “voice” their feelings. Some Telegram Channels content management tips A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP.
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