How to Create a Private or Public Channel on Telegram? The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. The public channel had more than 109,000 subscribers, Judge Hui said. Ng had the power to remove or amend the messages in the channel, but he “allowed them to exist.” Unlimited number of subscribers per channel Content is editable within two days of publishing
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