To delete a channel with over 1,000 subscribers, you need to contact user support 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. Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” Users are more open to new information on workdays rather than weekends. best-secure-messaging-apps-shutterstock-1892950018.jpg
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