With the pace of smartphone evolution moving so fast, there's always something waiting in the wings. No sooner have you spied the latest handset, then there's anticipation of something else, the next big thing to envy.
We've rounded up the best smartphones for 2015, those we consider to be the best across all platforms, and we've regularly updated that list as the smartphone world has evolved.
Here we're looking at those phones that haven't yet launched, those we know are coming, or are anticipated. We'll be updating this list on a regular basis, with those device rumours we think are credible and exciting, and devices just announced but yet to hit the shelves.
Apple iPhone 6S
Just as the sun rises and sets, there will be a new iPhone in 2015. Following the patterns of update cycles of the past, it will be the iPhone 6S, and chances are, it will have the same design as the iPhone 6, making a few updates in a few places.
You can expect the same size display and resolution, but you might see the introduction of Force Touch on the display. This new method of interaction was introduced on the Apple Watch as well as the new MacBook, so it makes sense for it to come to the iPhone 6S and new iPads.
Apple previewed iOS 9 at WWDC in June, announcing that the new software would be available in "fall" 2015. A recent rumour suggested 9 September will be the announcement date for the iPhone 6S so if true, expect the new software to debut then too. We know that Apple Pay, Siri, Maps and other features will be updated.
There's also the rumour circulating that the iPhone 6S will use the new aluminium that Apple developed for the Apple Watch. This is said to be strong, but 60 per cent lighter than other aluminiums. Other specs expected to appear on the iPhone 6S include an A9 chip, 2GB of RAM, an improved camera, wireless charging support and storage options of 32GB, 64GB and 128GB.
Rumours are circulating that Sony might be looking to launch a true flagship model in the Xperia Z5, with September as the timeframe for launch. The timeframe of September fits with IFA 2015 and Sony has started teasing for an IFA Xperia launch.
There hasn't been too much said about Sony's Z5 devices so far, but leaks have suggested multiple models, including the Z5, the Z5 Compact and a Z5+. We're not sure that Sony would launch three devices simultaneously, but that's the rumour that's circulating.
It's likely that they will stick to Sony's tried and tested OmniBalance design, with waterproofed bodies, but the big addition may well be a fingerprint scanner, which has been rumoured on several occasions. There's talk of a 4K display on the the Z5+, although elsewhere we've seen talk of a 5.5-inch full HD display, so things are far from clear.
With the recent Xperia Z3+ being somewhat incremental, a strong launch would be a real boost for Sony's Xperia family.
There are currently two Nexus devices rumoured to be launching before the end of 2015, one of which is said to be made by Huawei, going by the name of the Huawei Nexus Angler, or the Nexus 6, as it might be called.
The Huawei Nexus is rumoured to be a 5.7-inch QHD phablet that will succeed the current Motorola-made Nexus 6. Claims suggest there will be a 3500mAh battery on board, along with USB Type-C and a full metal body.
This has been rendered in video for an first glimpse at what the design might offer, including a fingerprint scanner on the rear, and appeared in some grubby photos showing off the metal bodywork. One thing is certain, however: the Huawei Nexus will debut Android 6.0 Marshmallow.
The second Nexus rumoured for release before the end of the year is said to be an update to the Nexus 5, which is claimed to be in the works at LG.
The rumoured LG-made next Nexus is said to be coming with a 5.2-inch display, along with the Snapdragon 808 processor, with a battery capacity of 2700mAh. Early pictures suggest a plastic body, suggesting this might be a cheaper Nexus than we've seen for a while.
We fully expect the next Nexus to have hardware to support the new features in Android 6.0 - namely a fingerprint scanner and USB Type-C. We're expecting Android Marshmallow and the new device(s) to launch in late-2015, October would fit with Google's annual cycle.
Microsoft Lumia 950 (Talkman) and Lumia 950 XL (Cityman)
Microsoft's executive vice president Stephen Elop announced a new Lumia would be arriving this year and since then, renders have been doing the rounds. The latest renders are of the rumoured Lumia 950, also known as Talkman, and the Lumia 950 XL, also known as Cityman.
The handsets have not been officially announced yet, but rumours suggest the Lumia 950 will come with a 5.2-inch with a 1920 x 1080 resolution, while the Microsoft Lumia 950 XL is expected to feature a larger 5.7-inch screen with higher 2560 x 1440 resolution.
Both should have 20-megapixel PureView cameras with the XL sporting a triple LED flash. They should also feature the latest USB with the Type-C connector, capable of huge data and power transfer rates.
The larger Lumia 950 XL is also expected to offer support for Microsoft Surface Pen tech and should feature a smartcase with cutout for notifications at a glance. Expect to hear more near the reported announcement date of 19 October.
The Huawei Mate 8 leaked on a roadmap that suggested it would arrive in June, but as that didn't happen, eyes are turning to IFA 2015 in Berlin instead, where Huawei has scheduled a press conference.
According to the rumours, the Mate 8 should feature the same size screen as its predecessor at 6-inches, but it will get a pixel bump from Full HD to Quad HD. It is also expected to come with a Kirin processor and the camera is listed at 16-megapixels.
A leaked video claiming to show the Mate 8 presents a metal body with a fingerprint reader. The rear camera should be a 20.7-megapixel shooter while the front-facing selfie snapper should manage respectable 8-megapixel shots. The battery is expected to be 4100mAh.
Huawei has also been teasing something called the Mate S, which could be the same device.
BlackBerry teased a slider handset at MWC 2015. It was a fleeting moment, but that device looked very much like the rumoured BlackBerry Venice. The big difference, however, is that BlackBerry Venice is said to run Android.
The result could be a device that's in some ways an evolution of the BlackBerry Torch, offering both a keyboard for BlackBerry users and a large touchscreen for Android fans.
There's been a recent flurry of leaks surrounding this phone and it's rumoured that the BlackBerry Venice will be landing in November, fully equipped with Android.
HTC is planning to release another hero handset in 2015. HTC chair and CEO Cher Wang has confirmed that there will be a new "hero product" launched in the smartphone category in October 2015. This phone might be codenamed Aero.
There's currently little to go on for this rumour, but previously, HTC has used October to launch the HTC Desire Eye (2014) and the HTC One max (2013), so another handset launch isn't entirely out of the question.
Talking about the "autumn handset", @LlabTooFeR, a regular HTC leaker on Twitter, said that it won't be revolutionary in terms of specs, but in design. It said: "Many of you have heard about the "HTC Autumn Flagship" but this is not a flagship in terms of specs (which are nice) but in terms of design."
Rumours suggest that HTC Aero will bring a revolutionary new camera technology with it. HTC hasn't been short of trying different things with cameras - UltraPixel and Duo Camera - so there's a chance that Aero could fix HTC's camera woes. A recent leaked image shows that the design looks a lot like the iPhone 6. It's rumoured for an October launch, hitting stores in early November.
Samsung made an early move releasing the Samsung Galaxy Note 5, but surprised made by saying that it's not going to be globally available. Those in the UK will have to wait for the Note 5, which is a great shame.
The Note 5 follows much of the same design direction as the Galaxy S6, this time encasing the Note 5 in an aluminium shell. On the front is a stunning 5.7-inch 2560 x 1440 pixel Super AMOLED display and lying under the skin is an Exynos 7 octa-core chipset, with 4GB of RAM.
That means loads of power, loads of screen space and a high quality of build. There's the S Pen, naturally, with a new spring mechanism, as well as the excellent cameras of the SGS6, which we have high hopes for in this larger model.
There's no changable battery and no microSD card, however, the trade-off for a higher quality of build. The Samsung Galaxy Note 5 is already arriving in customer's hands in the US, but those in the UK might have to import, or wait for Samsung to change its mind on releasing it in more countries.
Alongside the expected Note 5, Samsung announced the S6 edge+. This is an evolution of the Note Edge and the S6 edge announced earlier in 2015, giving a logical dual-edged, but larger format device.
The S6 edge+ has a 5.7-inch display, like the Note 5, but in this case with the curved edges, making it one of the more unique devices out there. It carries an impressive 2560 x 1440 pixel resolution display, Exynos 7 chipset with 4GB RAM and again, no option for microSD or changing the battery.
If that all looks familiar, that's because this is very much a bigger version of the phone that's already launched, in case you hadn't guessed by the name. There are some enhancements in edge functionality, but the real draw here is a bigger battery for that bigger display, whilst still offering that wonderful uniqueness of the Samsung Galaxy S6 edge.
Sony announced the Xperia M5 at the beginning of August and despite it being a mid-range device, it offers some pretty impressive specs, along side a familiar design.
Like its predecessor, the Xperia M4 Aqua, the Xperia M5 looks very much like the flagship Xperia Z range, although it substitutes the tempered glass rear for plastic. There is a 5-inch Full HD display, along with a 2GHz 64-bit MediaTek octa-core processor and 3GB of RAM.
There is also 16GB storage plus microSD expansion and Sony has introduced a 21.5-megapixel Exmor RS sensor to the M5, which boasts a 0.25-second Hybrid Autofocus that uses Phase Detection Auto Focus. The front-facing camera is 13-megaixels.
On top of everything, the M5 is also IP65/IP68 dust and water resistant, as well as just 7.6mm slim. It will be available from mid-August in black, gold and white, but Sony has yet to announce pricing.
The Moto X Play fuses together a 5.5-inch Full HD (1920 x 1080 pixel) resolution screen into the classic Moto X style with a 21-megapixel sensor on the rear to try and outsmart the likes of Apple, Sony and Samsung. There is also a 5-megapixel front camera for the selfie snappers.
Other key points include a 3630mAh battery, native Android v5 Lollipop running on this Moto, and turbocharged recharging, said to be up to 50 per cent faster than the super-fast recharge time of the Samsung Galaxy S6.
As with the previous Moto X, the Moto X Play will be available for customising under Moto Maker. There are 14 different backs to choose from, along with seven accent colours so you can make your Moto perfect for you. It will start from £279 and be available in August.
The Moto X Style is a fun and friendly smartphone with several high-end features, but at a price claimed to be a lot less than Samsung or Apple. Like the Moto X Play, it will also be available through Moto Maker with 18 inlay options and seven accent colours.
It has a 5.7 QHD display, front-facing stereo speakers and it offers the same turbo charging feature as its cheaper Moto X Play sibling. Motorola claims this feature will charges up to 50 per cent faster than the Samsung Galaxy S6 (already boasting fast charge abilities), to deliver 10 hours of battery life in 15 minutes.
The Moto X Style has a 21-megapixel rear-facing camera and a 5-megapixel front-facing camera with a wide-angle selfie mode. It will work on 4G LTE networks worldwide and it will sport the Qualcomm Snapdragon 808 processor under its hood, coupled with 3GB of RAM and 32GB or 64GB of internal storage, with microSD support. It will be available from September, starting at £359.
After being the subject of several rumours, the Samsung Galaxy A8 was confirmed on 15 July by the company, but it is currently only available in China.
The Samsung Galaxy A8 sports a 5.7-inch Super AMOLED display with a Full HD resolution. It is powered by the 64-bit octa-core Qualcomm Snapdragon 615 chipset and it is Samsung's slimmest device at just 5.9mm.
There's a 5-megapixel front camera, a 16-megaipixel rear camera, and a 3050mAh battery to keep things powered up. You'll also find 2GB of RAM and 16GB of internal storage (with microSD card support for up to a further 128GB).
There's no word on a global release date as yet, but we will let you know when we do.
Created by Motorola, and now shifted over to Google after the sale of Motorola to Lenovo, Project Ara has recently announced that it's postponing and won't be expected until 2016.
Project Ara is essentially an exoskeleton that allows users to modify what parts they want. That way someone that wants to spend the bulk of their budget on the camera, but doesn't need as much storage, can chose to upgrade that way. Perhaps one person will skip NFC in favour of faster 802.11ac Wi-Fi, for example.
There should also be third party components on offer that will allow for competitive pricing as well as new types of parts - like sensors. A person with diabetes may want a blood sugar sensor where another may not.