DEF CON 19 - hackers get hacked 
So it's clear: this post claims that there is a man-in-the-middle attack possible <i>over 4G networks</i> that allows an attacker to <i>own and capture data from an Android device, including texts and calls</i>.  If this is true, and if the media gets around to this, enterprise deployments of Android devices are truly <i>screwed</i>.