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. Add up to 50 administrators Unlimited number of subscribers per channel Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” Telegram desktop app: In the upper left corner, click the Menu icon (the one with three lines). Select “New Channel” from the drop-down menu.
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