Google’s Nexus Smartphones are vulnerable to SMS-based DOS attack, where an attacker can force it to restart, freeze, or lose network connection by sending a large number of special SMS messages to them.
The vulnerability, discovered by Bogdan Alecu, a system administrator at Dutch IT services company Levi9, and affects all Android 4.x firmware versions on Google Galaxy Nexus, Nexus 4 and Nexus 5