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Secret chats To lock your messages, go to “Settings”, “Privacy and Security” and tap on “Passcode Lock”. You will be asked to set a four-digit passcode and confirm it. Once you do that, you will find additional options to “unlock the app with fingerprint” and “auto-lock” it after a specific duration. Secret Chats

Adaptive (Android) or Automatic (iOS): The mode will automatically switch based on the light level around you; you can define the threshold. App Customizing Options and Themes Premium subscribers are able to download media and files at the fastest possible speed. You can access everything in your unlimited cloud storage as fast as your network can keep up. Open Telegram app -> Settings -> Privacy and Security.

Disabled: Turn off automatic night mode and always use the chosen theme. Telegram offers plenty of options for customization to make the app feel like a truly personal experience. Here is the list of interface element you can change: Customize Theme and Message Corners Lock Your Chats 1b

Improved External Sharing on iOS There are many astonishing features that set Telegram messenger apart from other messaging services. For instance, you can coordinate groups of up to 200,000 members, send documents of any type, destruct your messages with a timer, or even build your own tools on their API.