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Telegram is all about privacy and security, and it isn't beholden to larger companies like Facebook. In some countries, Sponsored Messages are shown in large, public one-to-many channels. These minimalist, privacy-conscious s help support Telegram's operating costs, but will no longer appear for subscribers of Telegram Premium. To preview a chat, simply press and hold its profile picture in your chat list.

If you want to use Telegram in a region where it's blocked, you'll appreciate the Telegram function that allows you to connect via a proxy server. Most of the time, it's better to use a VPN on your phone, but a proxy can still help you get around regional restrictions. Telegram may be among the most popular messaging services in the world, yet there are still many who don’t know what it’s all about. The app is often name-dropped in discussions regarding online privacy and security, but aren’t all messaging apps secure? Don’t more popular apps like WhatsApp and Facebook Messenger (despite their ties to Facebook) also have the fabled “end-to-end” encryption? What makes Telegram so special? One of the worst parts about messaging apps is that anyone can add you to random groups without your active permission. However, the good part is that Telegram gives you an option to disable it altogether. You can change the desired settings from Settings menu -> Privacy and Security -> Groups -> My Contacts and then select all the Telegram users to “Never Allow”. I can’t tell you how much I love this Telegram trick. To enable this go to Settings and choose “Privacy and Security” from the list. Next, tap on “Passcode Lock” under the Security heading, then set your password lock on!

Then choose Change Number and follow the instructions. This will move all messages, clients, and media to your new mobile number. Plus, Telegram will automatically add your new number in the address books of all your contacts. 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. All premium users get a Premium special badge that appears next to their name in the chat list, chat headers, and member lists in groups – showing that they help support Telegram and are part of the club that receives exclusive features first. When multiple users share their live location within a group, they’re displayed on an interactive map. To use this feature, choose “location” from the attachment menu and tap on “Share my location for…”

Custom themes You don’t have to start from scratch to make Telegram apps. TDLib (Telegram Database Library) makes it easy to develop feature-rich and secure apps. It takes care of local data storage, network implementation details, and encryption so that you can focus on design and interfaces.