Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. 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.” Add up to 50 administrators Unlimited number of subscribers per channel
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