5Telegram Channel avatar size/dimensions Your posting frequency depends on the topic of your channel. If you have a news channel, it’s OK to publish new content every day (or even every hour). For other industries, stick with 2-3 large posts a week. Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.” The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: The Channel name and bio must be no more than 255 characters long
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