1. Download the application- Click Here.
3. Install it in your device like you install other applications.
4. Open the application from your launcher drawer and click on it, now you will see a BIG lock, click on the lock to enable Blow/shake to unlock for your device.
Now lock your device to see that is it activated. Blow or shake to unlock!
Note: You might not see the text but the features i.e., Blow and Shake to unlock will work. If you are blowing and it is not working then blow more!