Telegram Android app: Open the chats list, click the menu icon and select โNew Channel.โ The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. Click โSaveโ ; Done! Now youโre the proud owner of a Telegram channel. The next step is to set up and customize your channel. ZDNET RECOMMENDS
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