As inevitably as summer follows spring the Samsung Galaxy Note 4 will follow the Samsung Galaxy Note 3.

The Note 3 came out last year and the Galaxy S5 has already broken cover, so it seems safe to assume that the Samsung Galaxy Note 4 will arrive before too long.

So far news and rumors about the device are pretty slim on the ground. We expect they'll pick up steam once the dust has settled on the Galaxy S5, but we have heard a few things, from the possibility of a 64-bit processor, to a curved screen and more.

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

Samsung Galaxy Note 4 release date and price

We're pretty certain we'll see the Samsung Galaxy Note 4 on September 3. Samsung has sent invites for an event advising people to 'Note the date', which is a bit of a give away. But even before then rumors were converging around early September.

Note 4 invite

Earlier in the yea Samsung mobile chief Lee Young Hee told Bloomberg that it would be launched in the second half of 2014, while the Korea Times claimed it had been told the Note 4 will arrive at the IFA show in Berlin. Android Geek's sources got even more specific, claiming it will arrive on September 3, as did The Korea Times.

The previous three Galaxy Note smartphones were announced in the first week of September at the IFA show in Berlin, so there's a fair chance we'll see the new one then too. In fact with no conflicting rumors we'd say that IFA will almost certainly be used as a platform to launch the Galaxy Note 4.

There's been very little said about the price yet, but a listing on Indonesian site erafone puts it at IDR 9,499,000 (or roughly £490 / $810 / AU$870) which seems believable, especially since those conversions don't include local taxes. Better start saving.

Samsung Galaxy Note 4 screen

First up, screen size. The original Note rocked 5.3 inches, 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 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.

That may make logical sense but a mention of the phone on Indian site Zauba lists it as having a 5.7-inch display while an Antutu benchmark result also pegs it at 5.7 inches and so does a report from the Korea Times, so it might not be getting any bigger at all.

As for the resolution, a user agent profile on Samsung's own website suggests that the Galaxy Note 4 will have a 2560 x 1440 QHD screen, which would make sense as now that the LG G3 has just such a display it's likely that all sorts of phones will follow suit and the Galaxy Note 4 is likely to be one of the few handsets with a screen big enough to benefit from it.

A listing on erafone also claims it will have a 5.7-inch QHD Super AMOLED display with a pixel density of 515 pixels per inch and given that the Galaxy S5 LTE-A already got a 2K boost this seems believable.

Samsung's done well with Super AMOLED, but there's a suggestion that it might ditch the technology for the Galaxy Note 4 and use PLS LCD instead.

A report by ET News claims that Samsung is "considering" using the technology in future as it could apparently cut costs by as much as 20% by doing so. But Samsung is apparently only considering it in any case, so there's hope for Super AMOLED yet.

In fact AMOLED is looking ever more likely, as SamMobile has 'confirmed' that the phablet will have an AMOLED screen.

Screen

A more positive potential change is that the Galaxy Note 4 might have a curved screen, but not in the way we've seen on the Galaxy Round. Instead the bulk of the display would be flat but it would curve off at the edges so that there'd be no visible bezel.

This particular rumor stems from a patent filed by Samsung late last year, which shows a very Note-like device as the subject.

Surprisingly that rumor is gaining some steam, as ZDNet Korea is reporting that the Galaxy Note 4 might have a flexible display and that "industry insiders" claim it will have a three-sided screen, presumably allowing you to read notifications and the like from side on.

A new Samsung patent also shows a device with a curved, multi-sided screen and interestingly it looks as if certain apps or on-screen buttons, such as camera, email, settings and the back button will be lined up down one of the sides, giving you easy access to them without taking up valuable screen real estate on the front of the phone.

Note 4 screen patent

If this pans out then it will be a big change for Samsung's phablet flagship, but that's not necessarily a bad thing.

Recently a Samsung executive confirmed that the company is thinking about a flexible display while ZDNet reckons a three-sided Samsung screen has entered trial production and we've even seen a trademark for the 'Galaxy Note Edge' which could be referring to a device with a screen that curves around the edges, though that's pure speculation.

So in other words nothing is set in stone one way or another, but there is at least a chance that we'll get a curvy screen.

Indeed another rumor suggests the Samsung Galaxy Note 4 will come in two variants, one sporting the traditional flat screen and the other packing a tasty curved display.

We've also heard reports from South Korea claiming that Samsung is working on a phone with a flexible, three-sided display for launch later this year, possibly as soon as September.

It's not stated whether it's the Galaxy Note 4, but given all the curved screen rumors surrounding it already and the fact that it's likely to launch in September it's looking increasingly likely that at least one version of Samsung's phablet will sport a curved, flexible screen.

Samsung Galaxy Note 4 power

So far Apple is the only mobile phone maker that's using 64-bit chips, but Samsung is set on joining the party. Kyushik Hong, vp of marketing for Samsung's LSI business told CNET that Samsung is "very actively working" on 64-bit right now.

So, while we didn't see one in the Galaxy S5 there's a chance that 64-bit chips might make their Android debut in the Galaxy Note 4.

Indeed SamMobile reports that the European version of the Note 4 will feature Samsung's new Exynos 5433 chip, while the North American, Korean, Chinese and Japanese market will get a Snapdragon 805 processor.

That matches a listing on erafone which states the Note 4 will come in a 2.5GHz quad-core Snapdragon 805 variant and an octa-core Exynos 5433 version, with four cores clocked at 1.3GHz and the other four with no speed listed, though we'd expect them to faster.

The listing goes on to say that the Galaxy Note 4 will come in 16, 32 and 64GB varieties and will have a microSD card slot with support for cards of up to 128GB.

The Note series is usually where we see a bump up in RAM from Samsung, and with the Note 3 packing 3GB we could well see the Galaxy Note 4 rock up with a tasty 4GB under the hood, which is exactly what erafone reckons.

Both the Note 3 and Galaxy S5 sport the Adreno 330 GPU, which leaves the door wide open for the Samsung Galaxy Note 4 to enter the fray with a beefed up graphical processor - could this be the best gaming mobile to date?

If you believe some Antutu benchmark results the Galaxy Note 4 may well rock up in two variants as we've heard from other sources, one sporting a quad-core Snapdragon 805 version an Adreno 420 GPU, and another with an octo-core Exynos 5433 (the newest version of the SoC) processor, ARM Mali-T760 GPU combo.

Both are said to have 3GB of RAM backing them up and 32GB of internal storage stuffed inside giving you plenty power and space to play with.

Both phablets have appeared again in a set of AnTuTu benchmarks and the Exynos powered version seems far more powerful than its Snapdragon 805 powered sibling. Other information highlighted by the benchmarks include the fact that the Exynos model has a 2560 x 1440 QHD display, while the Snapdragon handset is stuck at 1080p.

The Exynos 5433 version of the Note 4 is also 64-bit, yet AnTuTu wasn't able to test it in a 64-bit environment, so it's possible that it's even more powerful than the results suggest.

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

Samsung Galaxy Note 4 camera

The Galaxy Note 4 might be in for quite the camera upgrade, as a report from ET News claims that Samsung is developing a 20MP sensor, due for release in the second half of the year.

Note 3 Camera

With the Galaxy Note 4 also due to be released later in the year it seems a possible candidate to benefit from the lens.

The Galaxy Note 3 only has a 13MP camera and even the Samsung Galaxy S5 has just a 16MP sensor, so the Note 4 could be Samsung's best camera phone yet.

Though more recent rumors from SamMobile and an Antutu benchmark point to a 16MP snapper, albeit a new Sony IMX240 one. According to erafone the 16MP camera will also have optical image stabilisation and a dual-LED flash. That will apparently be coupled with either a 2MP or 3.6MP front facing camera.

More recently still we've heard claims that the Note 4 will actually have just a 12MP sensor, but that it will pack optical image stabilisation. Sources say that a 20MP snapper was originally planned, but the decision was made to drop it to 12MP in order to keep the phone thin while still including OIS.

G for Games reports that the Galaxy Note 4 will indeed have OIS, but that it will use a 16 megapixel camera and SamMobile has weighed in again with some of the most detailed and convincing camera rumors yet.

According to sources speaking to the site, the Samsung Galaxy Note 4 will have a 16MP Sony IMX240 camera, capable of shooting HD video with a resolution of 3840 x 2160 at up to 30fps.

But that's not all, it will also apparently feature optical image stabilisation, just like previous rumors have said and it will have a 3.7MP front-facing snapper. There's also reportedly going to be a side-mounted capacitive button known as 'Side Touch', which can be used to take photos and if the screen is off you can apparently tap two fingers on it and swipe them apart to launch the camera.

SamMobile's source goes on to say that the Note 4 will have four new camera modes, including 'Selfie mode', 'Selfie Alarm', 'Wide Selfie' and 'Create a GIF File', with 'Selfie Alarm' apparently automatically detecting your face to allow you to snap selfies with the main camera.