WhatsApp's design still makes this impossible without leaking backups to Facebook or using a Keyboard that leaks what you type, this goes for calls as well. It

WhatsApp's design still makes this impossible without leaking backups to Facebook or using a Keyboard that leaks what you type, this goes for calls as well. It's not exactly clear what they actually want to do in the future, I assume it will have to do with the "modern" features like Statuses or they'll have a Facebook account-based backup solution.