To delete a channel with over 1,000 subscribers, you need to contact user support 6How to manage your Telegram channel? A new window will come up. Enter your channel name and bio. (See the character limits above.) Click “Create.” Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel. To edit your name or bio, click the Menu icon and select “Manage Channel.”
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