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To lock a chat go to Settings->Privacy and Security->Passcode Lock and enable it. Once you create a passcode and enable it, you will be able to lock and unlock your chats by tapping on the lock icon at the top right of the app. Create Timestamp for Videos Unlike mass-market messengers like WhatsApp and Line, Telegram is an open-source app. This means anyone can check the app’s source code, protocol, API, and see how it works and make an informed decision.

You can take a new photo, upload an existing one, search the web for a new image, or remove your current photo. If you're part of many Telegram chats—maybe you joined too many of the best Telegram channels—they can quickly become annoying. When this happens, you can always mute a chat without leaving it. This way, you can check it on your own terms instead of getting a ping for every new message. Signal Vs. Telegram: Which Secure Messaging App Is Better? Telegram Saved Files

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Adaptive (Android) or Automatic (iOS): The mode will automatically switch based on the light level around you; you can define the threshold. Telegram Chat Background