Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” 2How to set up a Telegram channel? (A step-by-step tutorial) Clear 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. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel.
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