Earlier quoted context omitted.
> I recently saw how all my friends moved to Telegram, and this is nice. All my friends are on Whatsapp, and this is not nice... I'm going to try to convert them to Telegram., not easy.
I don't understand why people on HN are still recommending Telegram. It's not open, the crypto is highly questionable, and messages are not encrypted end-to-end by default (and not at all in groups). Use one of the apps that gets a full score in the EFF's Secure Messaging Scorecard [1], like Signal. [1] https://www.eff.org/secure-messaging-scorecard
Or ...Telegram (search in that page for "Telegram (secret chats)")