How To Take A Screenshot or Screen Capture With The BlackBerry Curve
Unfortunately, there is no way to natively take a screenshot on a BlackBerry Curve 
However, users can use apps like Capture It or Screen Muncher to take screenshots.
How To Take a Screenshot or Screen Capture with the HTC One M8 To Take A Screenshot or Screen Capture With The HTC One M8 simply: Hold down the VOLUME DOWN button and the POWER button for a few seconds. The screenshot will be saved to the /screenshots folder or in the gallery....
How To Take A Screenshot or Screen Capture With The Alcatel Idol 3C To take a screenshot or screen capture with the Alcatel Idol 3C Press and hold the VOLUME DOWN and POWER buttons at the same time....
How To Take A Screenshot or Screen Capture With The HTC Sensation XL: To take a screenshot or screen capture with the HTC Sensation XL, simply: Hold down the POWER button, found at the top of the phone, and then press the HOME button. The HOME button is the first touchscreen button on the front of … Continue reading HTC Sensation XL...
How To Take A Screenshot or Screen Capture With The Nokia Lumia 800: Unfortunately, there is no way to natively take a screenshot on a Nokia Lumia 800 without having a developer unlocked device ...