Now you can listen to audio from compatible third-party apps while checking email, surfing the web, playing games, and performing other tasks. So when you want to follow a ball game or listen to music from Pandora, your productivity never skips a beat
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Get VoIP calls while using other apps.
Third-party apps such as Skype let you make voice calls over the Internet. Multitasking in iPhone 4 makes it possible to receive these Skype or VoIP calls while other apps are running, even when your iPhone is locked. And during a call, you can keep the conversation going while you switch to another task, such as checking a movie listing or reading an email.
Keep GPS apps running.
Apps that use GPS can continue to run in the background. Not only do they constantly update your position, they can also give you spoken turn-by-turn directions even as you listen to music (the music volume lowers while the directions are spoken). It’s perfect for social networking apps, too. Now you and your friends can find each other even when you’re not actively using the app.
