It looks like a good amount of the Microsoft Windows Phone devices suffer from a denial of service attack which allows an attacker to disable the messaging functionality on the device. The flaw is exploited very simply, all it takes is one SMS to a Windows Phone user. It is reported that Windows Phone 7.5 devices will actually reboot and the messaging hub will not open. The attack does not seem device specific and could be an issue with the way the Windows Phone Messaging hub actually handles messages. This bug can also happen if a user sends a Facebook chat message or even a Windows Live message. There are even reports it affects more than just messaging. If a user has pinned a friend as a live tile on their device and the friend posts a particular message on Facebook then the live tile will update and causes the device to lock up. Thankfully there’s a workaround for the live tile issue, at initial boot up you have a small amount of time to get past the lock screen and into the home screen to remove the pinned live tile before it flips over and locks the device. So anyone with a Windows Phone be careful.