2How to set up a Telegram channel? (A step-by-step tutorial) 6How to manage your Telegram channel? Telegram Android app: Open the chats list, click the menu icon and 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. How to Create a Private or Public Channel on Telegram?
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