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Private chat app using wifi only. No SIM available
(sh.itjust.works)
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
much thanks to @gary_host_laptop for the logo design :)
If you want to use imessage on android:
https://www.wired.com/story/how-to-use-imessage-android/
(includes self-hosting options)
If you want to use whatsapp:
If someone else has an old (and/or prepay) sim which can receive texts, you can authenticate whatsapp that way. IRC you can also authenticate with a landline. Install whatsapp using the landline number, wait for SMS authentication to fail, then it should ask to call you. Say yes, and you'll get a call with the authentication code. Et voila.
Good luck with that, is all I can say. Kids are very susceptible to peer pressure, especially as they enter their teen years. It's only when they're in their late teens that they'll open up again and start becoming more critical.