With iOS new iPhone buyers will no longer have to activate their iPhone 4S by connecting it to a computer with iTunes. The process works quickly, so long as your carrier’s activation server isn’t overloaded with hundreds of thousands of new users on one day, as was the case with so many.
Multitasking: Though you've always been able to multitask with native iPhone features like the music player, the option is now available for third-party apps. Your primary access point is a multitasking menu that's accessible by double-tapping the Home button. Once there, you'll see a list of currently running applications along the bottom of the display that you can scroll through using a sideways finger swipe. The pop-up menu shows only four apps at a time, but you can keep many more in the tray.
For example, the iPhone 6 can be used to control your Apple TV, and you can share content on your phone via your TV display. The latest version of Mac OS X, Yosemite, lets you start writing a message on your phone and then pick it up on your computer, or vice versa, using "Handoffs." You can use your Yosemite Mac to place a phone call via your iPhone's cellular connection. You can activate your iPhone's personal hotspot directly from your Mac so you don't ever have to take your phone out of your pocket. .
For a limited time (ending June 23, 2016), if you purchased any new iPhone, you could receive an iPhone SE for free (or up to $400 off any other iPhone) via mail-in rebate with a new line of service.