How to Create a Private or Public Channel on Telegram? A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. 5Telegram Channel avatar size/dimensions For crypto enthusiasts, there was the “gm” app, a self-described “meme app” which only allowed users to greet each other with “gm,” or “good morning,” a common acronym thrown around on Crypto Twitter and Discord. But the gm app was shut down back in September after a hacker reportedly gained access to user data. You can invite up to 200 people from your contacts to join your channel as the next step. Select the users you want to add and click “Invite.” You can skip this step altogether.
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