edit: After a while it now shows up with certain contacts for me
> This includes chats, group chats, attachments, voice notes, and voice calls across Android, iPhone, Windows Phone, Nokia S40, Nokia S60, Blackberry, and BB10.
> Before all users have updated to the latest version of the software for their platform, there will still be some plaintext on the network. To make this transition as clear as possible, WhatsApp clients notify users when their chats become end to end encrypted. Starting today, users will see a notice in their conversation screen as their individual and group chats become end to end encrypted. Additionally, the encryption status of any chat is visible under that chat's preferences screen.
I imagine all of the end-points in the conversation, including you, your friends, and any bots or loggers (I don't know how these things work) will need to be able to handle end to end encryption before they switch or I'd imagine those who are left out will just see a bunch of garbage.
This includes chats, group chats, attachments, voice notes, and voice calls across Android, iPhone, Windows Phone, Nokia S40, Nokia S60, Blackberry, and BB10.
Users running the most recent versions of WhatsApp on any platform now get full end to end encryption for every message they send and every WhatsApp call they make when communicating with each other.
> This includes chats, group chats, attachments, voice notes, and voice calls across Android, iPhone, Windows Phone, Nokia S40, Nokia S60, Blackberry, and BB10. > > As of today, the integration is fully complete.
I haven't seen the notification either, yet, though.