Finally, Samsung's new Galaxy S III has been unveiled. Watch the Samsung Mobile Unpacked 2012 event in London live below:

And because of the previous Galaxy model's success, Samsung is now the world's biggest phone manufacturer, knocking Nokia off that top list. It will be no doubt that they might just be able to keep that spot with the latest iteration of the Galaxy when it hits stores shortly.

Measuring at 4.8 inches, you can tell that they've really worked hard at retaining the Galaxy S II's footprint, eventhough the S III is 22 per cent larger in its display, and 16 percent bigger than the S II.

Rather than bolting a silly 16MP camera sensor on, or slimming it down to the slim widths of the Motorola Droid RAZR, they've instead focused most of their attention on upgrading Android 4.0 (Ice Cream Sandwich) with some much-needed features. Check out the commercial for it first:

The 4.8-inch display is a Super AMOLED panel with 720 x 1280 (306ppi) resolution, and inserted just above that display. They've got a 1.9 MP forward facing camera that shoots at 720p, and on its back is a simple 8MP camera that can shoot 1080p video.

The phone runs on Samsung's new 1.4GHz Exynos 4 Cortex-A9 quad-core chips, it comes with 1GB of RAM, and a choice of either 16, 32 or 64GB internal storage configurations.

In certain territories (the US, Japan and Korea), the S III will be available in LTE. It includes seven sensors, including an accelerometer; RGB light; digital compass; proximity; gryoscope; NFC, and barometer have been shoved in too.

Weighing at 133grams, it measures 136.6 x 70.6 x 8.6mm, and houses a 2100mAh battery; Samsung's first smartphone with a battery that size.

While all of that sounds great what's really note worth is that Samsung overhauled ICS with some nifty new tricks. These include:

Smart Stay, which uses the forward-facing camera to determine if you're looking at the phone. You can set time intervals from as little as 15 seconds, which result in a small flashing eye logo in the Android notification bar. If your eyes aren't focused on the phone, the screen will dim.

Direct Call: auto dial a contact if you have their contact details or a message open. All you need to do is move the phone to your ear, and the proximity sensor, accelerometer and gyroscope will all kick in.

Smart Alert: It makes the phone vibrate in your hand and flash an LED if you pick the phone up after a missed call.

S Voice: Like  a Siri function, you can enquire about the weather or take a photo, locking the phone, controlling music and more.

Social Tag, which links photos of friends in your photo gallery to their Facebook or Google+ accounts, using facial recognition.

S Beam: Pairs other Galaxy S III phones via NFC, shares photos, videos, files or media over Wi-Fi. If your friend's S III doesn't have Wi-Fi enabled, S Beam will automatically turn that user's Wi-Fi on, and then off.

AllShare Cast, which pairs to TVs, laptops or tablets over Wi-Fi, mirroring whatever's on the S III.

As for the camera, opening the app takes less than one second and can be activated with a gesture by pressing and holding the screen and rotating it. It also has backside illumination to ensure the camera can shoot in low light conditions and advanced software to allow intelligent face zooming and group tagging through facial recognition.

Minimal lag. Samsung minimised reloading time drastically with the S III, so there's virtually no lag between pressing the button and the shot being taken.

Burst Shot / Best Photo, which takes 20 shots in quick succession (six photos per second), and then recommends the best photo (using algorithms to determine which has the best light, and which has all eyes open, for example).

Face Zoom, which recognises individual faces in a live view, so you can tap a face and zoom in, taking a photo only of them.

Photos while filming:  Like the feature HTC added to their One series, Samsung also thought about those people who like to take photos at the same time as filming video. It's possible now.

Finally, did we mention its got wireless charging via resonance technology? Sounds like one heck of a powerful phone already.