How To Take A Screenshot or Screen Capture With The Sony Ericsson Xperia Arc:
Unfortunately, the Sony Ericsson Xperia Arc cannot natively take screenshots 
However, users can root the device or install the Android SDK to take screenshots. There are many guides out there to achieve this, but be careful!
How To Take A Screenshot or Screen Capture With The Micromax Unite 2 A106 To take a screenshot or screen capture with the Micromax Unite 2 A106: Hold down the POWER button and the VOLUME DOWN button....
How To Take A Screenshot or Screen Capture With The HTC Desire 820s To take a screenshot or screen capture with the HTC Desire 820s: Hold down the POWER button and the VOLUME DOWN button....
How To Take A Screenshot or Screen Capture With The Samsung Galaxy S3/SIII Mini To take a screenshot or screen capture with the Samsung Galaxy S3/SIII mini, simply: Hold down the HOME button and the POWER button at the same time. The HOME button is on the front of the phone at the bottom and the POWER button is on the side of the … Continue reading Samsung Galaxy S3 Mini...
How To Take A Screenshot With Blackberry Z10 / 10 To take a screenshot or screen capture on the Blackberry Z10 or the Blackberry 10, simply: Hold down the VOLUME UP and VOLUME DOWN buttons simultaneously. The image will appear in the SCREENSHOT folder....