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How to Create a Private or Public Channel on Telegram? Invite up to 200 users from your contacts to join your channel More>> 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. Public channels are public to the internet, regardless of whether or not they are subscribed. A public channel is displayed in search results and has a short address (link).
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