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If your device is stolen or someone took it, and you don’t want him/her to see the messages in your chat window, then you can simply terminate all the active sessions with just one click using your Mac, Desktop, Linux or Web client. Telegram allows users to locate contacts nearby you, should they choose to be discovered. This allows you to quickly add someone close to you on Telegram without going through the hassle of first noting their number and saving the contact manually. Users can also use this feature to find and create groups of nearby users. Create Timestamp for Videos

Telegram has an upload limit of 2 GB per single file. It was one of the most valuable Telegram features I mostly loved. If you do not want this to happen and want Telegram to keep running in the background to send you notifications in real-time, you can head over to Settings/ Notifications and Sounds/ Keep Alive Service and turn it on. Telegram Settings Turn Off Notifications for Individual Contacts 1b Telegram Messenger Tricks

For maximum privacy, you can create secret chats that use end-to-end encryption. These aren't stored on Telegram's servers, so you can only access them with your specific phone. If one party deletes a message, it disappears on both devices. And you can specify a self-destruct period for all media if you like. However, Telegram only uses this encryption in calls and in its “secret chats” feature, not in regular chats. Those are only encrypted client to server. Meanwhile, WhatsApp, the supposedly less secure service, has used end-to-end encryption in all messages, calls, and video calls since 2016. Join Requests for Public Groups With the ability to send files up to 2 GB (or 4 GB), users can easily share large media items from other apps directly to Telegram on any mobile platform. This saves both time and storage space – so you don't have to save the file before sending it in Telegram.

Launch the Telegram app on your iPhone or Android device -> navigate to the Settings and choose Devices. Telegram is all about privacy and security, and it isn't beholden to larger companies like Facebook.