The other day, when my iPhone locked up and started misbehaving, I pushed all kinds of buttons sequentially and simultaneously trying to get it to reboot. Somehow, I stumbled upon the iPhone print screen function but didn’t know how I actually did it. Thanks to my friend Marc Duverneuil – an iPhone applications developer – who reminded me how to take screen shots from my iPhone:
Simultaneously press the button on the top and the button on the bottom (front) for half a second
You will see a white flash and hear the sound of a camera. You will find the screen shot in the Photos section (the icon with the yellow Sunflower) and from there, you can e-mail the photo of the screenshot by pressing and holding the lower left corner of the image for half a second.