Tired of the fact that everyone constantly offends Telegrams. Telegram is generally the best that now is. Can you give any arguments against?
I can

1. It needs your phone number for registration - what is already not private.
2. It doesn't use end-to-end encryption. They tell they use it for secret chats only which are not available to everyone - only to iOS users.
3. IP address is exposed to operator
4. It has an access to user location
5. It stores all data on the server
Should I continue?
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so, do all your really necessary correspondence in secret chats, what's the problem? I do not think that you are such an interesting person, that some people are watching you and your correspondence

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I think it's not about correspondence only as some people do crypto transactions using messengers for example and they don't want to leak information dedicated to it for sure.