I want to create a service for the iPhone which will run in the background.
I can't find any help anywhere and I dont know if its possible or not.
iOS doesn't allow developer to create background services like in Android.
Check the belwo SO post that clearly state Only some of the Apple apps are allowed to do this
what kind of service are you programming ? Because Apple allows certain kinds of background tasks. More info at http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/BackgroundExecution/BackgroundExecution.html