Telegram desktop app: In the upper left corner, click the Menu icon (the one with three lines). Select “New Channel” from the drop-down menu. 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. Invite up to 200 users from your contacts to join your channel How to Create a Private or Public Channel on Telegram? Telegram Android app: Open the chats list, click the menu icon and select “New Channel.”
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