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. 3How to create a Telegram channel? A new window will come up. Enter your channel name and bio. (See the character limits above.) Click “Create.” Unlimited number of subscribers per channel Telegram Android app: Open the chats list, click the menu icon and select “New Channel.”
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