What if your cell phone could identify it was stolen by itself?

Also interesting:

Could you tell if a phone has been stolen by a change in the walking pattern of the person carrying it? An Android app developed by Marios Savvides and colleagues at Carnegie Mellon University in Pittsburgh, Pennsylvania, uses data from the accelerometer and gyroscope that come as standard on modern smartphones to record the movements that a phone makes as its owner walks. In a study to be presented this week at the BTAS biometrics conference in Washington DC, Savvides shows the app can identify a particular gait with over 95 per cent accuracy. The technology could one day be used to shut a device down if it registers a gait that does not match that of its owner

http://users.ece.cmu.edu/~juefeix/btas_2012_felix.pdf