Critical security bug remains unpatched in the majority of the over 1bn devices in use, but Stagefright Detector checks to see if your phone is affected

If you have an Android smartphone you are probably vulnerable to a security bug that could allow anyone to take over your phone using just a multimedia message.

For users there’s not a lot you can do. The bug, called Stagefright, affects the multimedia handling capabilities of every Android smartphone using the mobile operating system, of which there are over 1bn in circulation.