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Telegram News
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 edit your name or bio, click the Menu icon and select “Manage Channel.” Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” How to Create a Private or Public Channel on Telegram? How to create a business channel on Telegram? (Tutorial)
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