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Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” Invite up to 200 users from your contacts to join your channel 5Telegram Channel avatar size/dimensions 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. End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance.
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