MTProto - proxy works only with Telegram. The client and server do not have an open communication phase. In the Telegram MTProto-proxy server implementation, the proxy server and its owner do not have direct access to the MTProto protocol meta-information (logins, for example).
You can use MTProto with Telegram in any case, even if you have Telegram blocked or not. The MTProto service allows you to bypass Telegram blocking in your country.
22 february, 2020
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