Select “New Channel” 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. End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance. Step-by-step tutorial on desktop: A new window will come up. Enter your channel name and bio. (See the character limits above.) Click “Create.”
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