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. To delete a channel with over 1,000 subscribers, you need to contact user support How to create a business channel on Telegram? (Tutorial) Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel. Each account can create up to 10 public channels
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