The iphone 4 provides the opportunity to do more than one thing at a time. This is an important and relevant feature since the phone comes with so many different functions. When you double-click the start button, you’ll see how many applications are running. You then have the option to select the application you want to use and then reduce the others. The is the same concept that you would use for a computer. But now you can do this on your phone as well. For example, you can talk on an internet call app such as Skype while numerous applications are running. Or, if you are using GPS while you are on the road, you can still do other things in the background like listen to music. Doing more than one thing at a time is one of the features that makes the iPhone 4 very convenient.