How to Take Screenshots on your iPhone or iPod Touch
As long as you have the 2.0 version of the iPhone firmware or above, the iPhone or iPod Touch does not need any special screen capture software in order to take instant screenshots of your screen. Here is how it works:
1. Hold the Home button down
2. Press the Sleep/Wake button
Your screen should now flash white. This means that the iPhone or iPod Touch has successfully captured your screen and saved it as a photo.
3. Your screenshots can be found by pressing the Photos icon.
On an iPhone, you’d have to then navigate to the Camera Roll folder. On an iPod Touch, the screen captures are saved in the Saved Photos folder.