When I am searching for iPhone application that can take screen shot, I found this cool tips on how to take screen shot on the phone without installing any application.
iPhone itself has built-in a function to capture screen perfectly on any screen you are working on. Either you are opening an application or playing game. You can capture any screen at the same time.
- Press and hold the “Home” button at center bottom of the iPhone
- Then press and release the “Sleep” button on top right of the iPhone
- This causes the iPhone to “flash” white just like when you are taking a photo using camera option
- The image is added to your “camera roll” on the phone.
It is useful for anyone who wish to write step by step instruction on how to install application or tutorial on iPhone. It is really easy to use although sometimes I find it a bit hard to press the top right sleep button while holding the center bottom button.
Tips via eHow