Take Screenshots In iPhone 2.0 Software
In previous incarnations of iPhone software, it was possible to take screenshots using a built-in method, however, screenshots were only enabled after tweaking a preference file which required jailbreaking. Once the tweak was in place, holding the Home button while toggling the Ring/Silent switch would make the iPhone’s screen flash and a screenshot would be taken.
With the iPhone 2.0 software, screenshots are now enabled by default. To take a screenshot, you now hold the Home button while pressing the Sleep/Wake button. Your screen will flash and a grab of the current screen will be placed in your iPhone’s Photo app, which can then easily be imported using iPhoto or Windows Explorer.