Administrators 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. Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” Click “Save” ; 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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