You also have to consider that facebook already do this.  They tried to wrap up email, messages and an SMS replacement on your phone into a single package where they own the whole thing.<p>I look at iMessage and I think it works pretty perfectly, SMS when no internet or to a non apple user, iMessage whenever possible.  What I want is for whatsapp (and I suppose facebook and plausibly email) to do the same all in my single messenger application.<p>But.  Ignoring the need to get the tech owners to consent to this new &quot;trillian&quot;, I&#x27;d also have to trust the app itself.  Good luck making money on that.