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. A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. How to Create a Private or Public Channel on Telegram? To delete a channel with over 1,000 subscribers, you need to contact user support
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