Lots of bugs and malware are attacking the smartphones these days. Earlier, it was the Android and now a bug in the Windows Phone 7 is detected which can make you lose some important data from your phone.
If somebody sends a particular piece of text in the SMS to a Windows Phone 7 then, it will cause trouble to the messaging hub of the phone. It will not open does not matter how many times you try. Only option to get rid of this issue is to have a hard reset of your Windows Phone 7 which will erase data from your phone memory like contacts, messages etc.
The worst thing is that even if you receive the same text via Facebook message or Windows Live chat then also you phone will be affected. Have a look at the video given below which shows this bug going live on the Windows Phone 7.