The all-new Samsung Galaxy Note 4 has now been officially unveiled, but what does the successor to the Samsung Galaxy Note 3 actually bring?

Well there's no change to the size of the screen, which still comes in at the whopping 5.7 inches that we have come to know and love, but Samsung has made some significant changes to that killer feature.

That 5.7-incher is now a Quad HD Super AMOLED (2,560 x 1,440 resolution) technology that stretches to 500 pixels per inch.

You can check out our hands on with the Samsung Galaxy Note 4 review for our first impressions of just what has changed in this latest generation.

Cut to the chase
What is it? Samsung's fourth gen phablet
When's it out? October 17
What will it cost? A lot, even more than the pricey Galaxy S5

Samsung Galaxy Note 4 release date and price

The Galaxy Note 4 was announced at IFA 2014 on September 3. Samsung had sent invites for an event advising people to 'Note the date', which was a bit of a give away, and so it proved.

Note 4 invite

Samsung has confirmed that the Galaxy Note 4 is soon going to be available from its Experience stores in the UK. Originally it was going to be available from September 26 both there and at select retailers, such as Three and Carphone Warehouse, while the phone was set to go on general sale from October 10.

We're using the past tense here because Samsung has now delayed the launch of the Note 4 until October 17.

In the US you can pre-order the Note 4 from AT&T with deliveries starting on October 14. The phone is listed at $299.99 upfront plus $41.30 per month (or $34.42 per month on a Next plan), or you can get it for $825.99 off contract.

You can also pre-order from Verizon for $299.99 or from T-Mobile for zero money upfront and $31.24 per month, that will then wing its way over to you on October 17. Sprint isn't yet taking pre-orders but you can pre-register.

We're still waiting to hear an exact release date for the phone in other territories around the world, but a recent Samsung advert claims it will be available sometime in October. If you're in the UK then you can check out our release date guide for more detailed information on availability and pricing as we get it.

Speaking of price, we've already covered US pricing, there's been very little said about what it will be in the rest of the world yet, but a listing on Indonesian site erafone puts it at IDR 9,499,000 (or roughly £490 / AU$870) which seems believable, especially since those conversions don't include local taxes. We've also seen Clove in the UK list it at £575 (AU$1063). Better start saving.

With the Galaxy Note 4 hitting stores any day now we should have some more official prices soon.

An amazing screen - again

First up, screen size. The original Note came with a 5.3-incher, the Note 2 showed up with a 5.5-inch display and the Note 3 pushed things to 5.7 inches.

Going by this logic the Galaxy Note 4 should have come with a 5.9-inch display, which would see it match the HTC One Max and LG G Pro 2, while still falling short of the 6.4-inch Sony Xperia Z Ultra.

But actually Samsung showed admirable restraint, keeping the Note 4 to the 5.7 inches of its predecessor, but throwing a boat-load more quality into its killer feature.

Note 4's impressive screen
Note 4's impressive screen

The screen now boasts Quad HD Super AMOLED (2,560 x 1,440 resolution) technology that stretches to 500 pixels per inch.

Plus, Samsung is throwing in what it is calling an adaptive display - one that changes depending on the light of the place you are viewing the screen - and on paper you have the optimum viewing no matter what situation you are in. All this work has paid off, because it was recently hailed as having the best screen of any smartphone.

Samsung even decided to get fancy and launch a variant of the phone called the Samsung Galaxy Note Edge, which has a curved display that folds around the spine of the phone. Sadly this didn't make it to the main device, but it's a good test to see if there's desire for such innovation.

Samsung Galaxy Note 4 power and storage

The Galaxy Note 4 brings with it a pretty impressive 2.7GHz quad-core Qualcomm Snapdragon 805 processor, which certainly won't be struggling to keep things moving despite the screen.

Also worthy of, ahem, note, is the 3GB of RAM that the phone is running - there are still plenty of people with PCs that don't have that kind of memory.

The internal memory of the Galaxy Note 4 is a not insignificant 64GB, which should mean you don't have to choose between your collection of Jean Claude van Damme movies and your lovingly put-together eclectic music.

Of course, there's a microSD slot too, with the ability to add 128GB more if you're thinking of downloading the internet for a day.

Samsung's Note smartphone family
Galaxy Note | Galaxy Note 2 | Galaxy Note 3 | Galaxy Note 4

Samsung Galaxy Note 4 camera

The Galaxy Note 4 came in for quite the camera upgrade, but not the 20MP sensor that a report from ET News suggested was due for release in the second half of the year.

Note 4

Instead, it's gone from 13MP to 16MP but camera-philes will be more impressed with the Smart Optical Image Stabilisation, which helps keep every picture blur free and clear when you're snapping around.

If you hate the word selfie, look away now. The front-facing camera has followed the inexplicable trend and will allow you to take better self portraits, with a 3.7MP sensor with a f/1.9 aperture, allowing in a lot more light and mitigating the lack of flash.

The sensor can now make pictures look a lot more natural thanks to a 90-degree field of view – and the Note 4 has even stolen the panorama mode from the rear-facing camera to allow you to fit more people into your personal snap.

Oh, and you can tap the heart rate sensor on the back of the phone (more on that later) to take your pic to avoid shaking the camera. That's handy.

You can also use the rear camera in unison with the S Pen. A new feature called Snap Note allows you to take a picture of a piece of paper (or whiteboard) and change what's in the picture, which will apparently be excellent for when taking notes in a lecture. We're not sure how, either.