Every mobile has some secret codes .using this codes we can take screen shots in your mobile . here are some of the secret codes of some popular brands:
The Home key and Power/Lock key must be pressed at the exact same time to capture a screenshot. If a screenshot is not captured, please try again. It may take several attempts.
To capture your phone’s screen image, press and hold both the Power key and down volume key at the same time for three seconds, or until you hear the camera shutter click
press and hold both the Power key and down volume key. same as motorola
To capture a screenshot of the background simply Long press the Volume down key + Power/Lock button. Hold these two keys for a while may be for 3 seconds
the saved screen shots are saved in the phones gallery .