Click “Save” ; 5Telegram Channel avatar size/dimensions A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. How to Create a Private or Public Channel on Telegram? Developing social channels based on exchanging a single message isn’t exactly new, of course. Back in 2014, the “Yo” app was launched with the sole purpose of enabling users to send each other the greeting “Yo.”
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