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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. Invite up to 200 users from your contacts to join your channel 6How to manage your Telegram channel? It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS): To delete a channel with over 1,000 subscribers, you need to contact user support
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