Apple's sleek iPhone 6S features 3D Touch (pictures)

With the iPhone 6S, Apple finally unveiled its flagship phone for 2015. Equipped with a 4.7-inch display, an A9 processor and a 12-megapixel camera, the device starts at $649 (or £540 and AU$1,079) without a contract.

Though there is a new rose gold color option, all in all, the device feels nearly identical to its predecessor, the iPhone 6. It has a 750p resolution and 326ppi.

Like before, the handset has a fingerprint scanner built into its home button.

The phone measures 5.44 by 2.64 by 0.28 inches (138.3x67.1x 7.1mm) and weighs 5.04 ounces (143g)

The iPhone 6S has a new aerospace-grade aluminum chassis that will hopefully avoid the "Bendgate" issue from last year and a chemically strengthened glass display.

Powering the device is a a proprietary 64-bit A9 chip processor and a nonremovable 1,715mAh battery.

The handset runs Apple's iOS 9 mobile operating system, which includes the mobile payment system Apple Pay and the digital search and voice assistant Siri.

A new feature is 3D Touch, which works in conjunction with the pressure-sensitive display. Depending on how hard you press on the glass, you can interact with apps in different ways.

By tapping down on the Mail app, for example, a new dialogue window pops up that lists extra functionality.

Apple has bumped up the phone's camera specs from eight to 12 megapixels. Users can also shoot ultra high-def (4K) video.

A camera feature called Live Photos lets you take animated pictures, allowing objects or people to move for a few seconds within the frame.

The iPhone 6S is available for pre-order on September 12 and will launch in retail stores beginning September 25. For more on Apple's recently announced products, check out our coverage here.