First install optional encryption software. Something like textsecure and redphone. This way you use your phone in the same way, but if there's an option for

First install optional encryption software. Something like textsecure and redphone. This way you use your phone in the same way, but if there's an option for encryption, you can use it. Then maybe just use with your spouse . since those conversations are very private, maybe you could Convince him/her. And it does buy you protection from law and inadvertent snooping by friends(if I understand otr correctly). Now talk about this with your friends. They might want to use the same strategy. And now some of you're friends have the software, it's just a matter of setting keys. Seems possible.