Click “Save” ; Content is editable within two days of publishing 5Telegram Channel avatar size/dimensions End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance. In 2018, Telegram’s audience reached 200 million people, with 500,000 new users joining the messenger every day. It was launched for iOS on 14 August 2013 and Android on 20 October 2013.
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