Apple announced iPhone OS 4 and along with that, the ability it brings to the iPhone 3GS to multitask., it seems to be the most revolutionary os with some great features which will change the way iPhone used to work before. It’s also going to offer a range of other new features, like a unified email inbox, folders to organize application icons and a social network for gamers. Multitasking : To limit battery draining by apps running in the background, like it is happening with Android phones, Apple has limited the number of operating system (OS) services. That apps can access in the background to seven: Audio, VoIP, Location, Push Notifications, Local Notifications, Task Completion, Fast App Switching. Fast App Switching allows to freeze the apps and to restore them quickly when you switch back, thus avoid a complete reload. Along with multitasking, 1500 new API’s have been added to the new OS allowing users to make more calls to system functions. Programs such as Pandora will be able to run in the background.
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