I worked briefly on a mobile XMPP chat solution a few years ago, and considering this was when 3G was the best you could get and the application had to deal wit

I worked briefly on a mobile XMPP chat solution a few years ago, and considering this was when 3G was the best you could get and the application had to deal with some pretty bad connections, I don't remember XMPP having any intrinsic limitations like that.