The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. Telegram Android app: Open the chats list, click the menu icon and select โNew Channel.โ Polls Select: Settings โ Manage Channel โ Administrators โ Add administrator. From your list of subscribers, select the correct user. A new window will appear on the screen. Check the rights youโre willing to give to your administrator. Telegram Channels requirements & features
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