To delete a channel with over 1,000 subscribers, you need to contact user support A vandalised bank during the 2019 protest. File photo: May James/HKFP. How to Create a Private or Public Channel on Telegram? Today, we will address Telegram channels and how to use them for maximum benefit. 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.
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