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. Telegram users themselves will be able to flag and report potentially false content. Public channels are public to the internet, regardless of whether or not they are subscribed. A public channel is displayed in search results and has a short address (link). 2How to set up a Telegram channel? (A step-by-step tutorial)
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