It's easy using the application Screenshot by Kastor Soft
take note that Only ROOTED phones are supported.
(this app will works on Samsung Galaxy Pocket)
What does rooted phone mean?
It means gaining full access to your Android’s file system and control it as an administrator.
Just like on your computer you have administrator account and other accounts with less privileges. Rooting a phone means gaining access to administrator account. The application can do all stuff which requires administrator privileges.
How to use Screenshot by Kastor Soft?
You have an option to
shake your phone to take a screenshot.
check the box for Show notifications when screenshot is successful
so you know when the capture has been made.
then exit this app in any way and go to the place on your phone where you want to capture.
Shake your phone for 3 seconds.
Normally, 2 to 3 shake is enough (sideways).
You will hear a camera shot sound and you will see that the screen fade inwards once the screen was captured.
If you want to use this option other than shaking your phone,
you can do so by selecting first your desired delay before the shot is made, then click the camera icon.
After you clicked the camera icon, you will be directed to your home screen.
Once the delay time is reached, the application will now capture the present screen on your phone.