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. Image: Telegram. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel. How to build a private or public channel on Telegram? It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS):
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