No matter whether you are new or old to iPhone experience, the tips given in this article will let you work with your 3G iPhone more systematically. Moreover, the tips will save you many efforts of tapping on the home button or the main screen.

Home Button:
We have always talked and known about tapping the home button only once to get the homepage screen. What happens if you double tap the button quickly? Tapping twice actually takes you to your favorite list of people where you can just tap and make calls. Who says searching for contacts and making calls is not easy with this?

This can be enabled from your iPhone’s settings; Settings>General>Home Button.

• If the phone is locked, double tapping on the home button opens the iPod control screen. This is handy if you are listening to music and want to go forward/backward or pause the song without sliding open your iPhone.

• Double tapping the home button if the phone is unlocked takes you directly to your favorite contact list.

Tapping the iPhone Screen:
Double tap on the iPhone screen is pretty convenient for zooming in and zooming out images and text at a go. Most of us never cared to experiment or were too comfortable with the pinching in or out to do the same. Double tapping works equally well.
This is really cool if you want to view photos on the iPhone’s photo app, you can toggle between full screen mode and letterbox mode, just double tapping on the screen during video playback. Browsing is much more fun too as you can zoom in and zoom out the content with this double tapping trick.

You will also need to know some iPhone 3G shortcuts.