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 Lenovo A859 To take a screenshot or screen capture with the Lenovo A859 Hold down the POWER button and the VOLUME DOWN button....
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How To Take A Screenshot With Blackberry Curve 9320 Unfortunately, there is no way to natively take a screenshot on a BlackBerry Curve 9320 However, users can download apps like Capture It or Screen Muncher to take screenshots....
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