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. How to create a business channel on Telegram? (Tutorial) Step-by-step tutorial on desktop: But a Telegram statement also said: "Any requests related to political censorship or limiting human rights such as the rights to free speech or assembly are not and will not be considered."
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