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. How to Create a Private or Public Channel on Telegram? To delete a channel with over 1,000 subscribers, you need to contact user support To view your bio, click the Menu icon and select “View channel info.” It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS):
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