An attacker exploiting the flaw can force mobile device to restart, loose network connection or freeze by sending a large number of a special type of SMS messages, flash SMS. The vulnerability affects all Android 4.x firmware versions on Google Galaxy Nexus, Nexus 4 and Nexus 5. The attack can produce various problems to the targeted Google Nexus Mobile: It will either say that the Messaging application has stopped or cause a reboot this is what happens in most of the cases. The device will no longer be able to use mobile data (it can not connect to the APN)”]
Source: https://securityaffairs.co/wordpress/20120/hacking/google-nexus-dos.html