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The Bot API is a free and open platform, available to everyone. If you're looking to build your own bot, check out this page. However, Message history is the most revealing part of your phone when it comes to private information. I hope you may have some experience with it? Quick GIF and YouTube Search

This feature allows you to filter out and put personal chats, channels, groups, contacts in different and customized folders. You can customize folders the way you want, plus there are some additional features. For example, you can have all chats with unread messages automatically added to a folder. Enable Auto-Night Mode Finally, if you don't want to disturb the other person, choose Send without sound to silently deliver the message to the other party without them getting a notification. Turn on Secret Chat

A great way to organize your chats inside a group or channel is by using hashtags. When you use a hashtag in a message, that word becomes searchable allowing you to see all the messages relating to that topic. For example, if the group is discussing the new Avengers movie, everyone can use the Avengers hashtag. If you want to see all the messages in one location, you can just tap on the hashtag and all the messages with that hashtag will come up. My Contacts: Allow only your contacts to view your profile. Customize Telegram App Icon Telegram Change Number

If you want to add a second number instead of migrating, Telegram also lets you use multiple accounts at once. For Android, on the left sidebar, tap your contact info to expand the account switcher and choose Add Account. On iPhone, tap Edit on the profile page and choose Add Another Account. Perhaps the most important and the best feature of the Telegram app is its security. It is based on the MTProto protocol that is built upon time-tested algorithms. It enables high-speed, reliable message delivery on weak connections.