If you need to know everything about Telegram, they have a nicely categorized FAQ page so you can refer to it for deep information. Improved Chat Previews on Android Message corners
Go to Settings > Chat Settings to create your own theme. Under the App Icon section, you should see a handful of pre-defined app icons such as Aqua, Sunset, Mono Black, Classic, Classic Black, Filled, and Filled Black. Now, choose a suitable app icon and you are all set! Keep-Alive Service Telegram has a cloud service that stores messages, photos, videos, and documents. You can access your data from any of your devices anytime without having to rely on third-party backups.
Adaptive (Android) or Automatic (iOS): The mode will automatically switch based on the light level around you; you can define the threshold. Edit Photos/Videos Before Sending Them delete sender's message Manage When Old Sessions are Automatically Terminated
Should You Trust Telegram? Telegram Messenger Tricks
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