1What is Telegram Channels? How to Create a Private or Public Channel on Telegram? best-secure-messaging-apps-shutterstock-1892950018.jpg 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. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel.
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