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.
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.
You can find those in our Best smartphones 2016: The best phones available to buy today feature. If your budget is a little smaller, there is also our Best budget smartphones 2016: The best phones available to buy for under £250.
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.
The OnePlus 2 has been kicking around for a while now, launching in July 2015, while the OnePlus X graced us with its presence in October 2015 but rumours are reaching their climax ahead of the next OnePlus device - the OnePlus 3. The ambitious and often controversial company is holding an event on June 14th, and will be hosting an immersive VR live event on a virtual spaceship.
One set of leaked specs suggested a Full HD display and Qualcomm Snapdragon 820 chip under the hood of the new OnePlus flagship, while another leak has suggested we could see three different screen sizes and a couple of different storage and RAM configurations. A fingerprint sensor and metal body have also been claimed. The company's co-founder has said the OnePlus 3 will offer a "new design", suggesting those rumours of an all-metal case could be on the money.
We expect the rumours and speculation for the OnePlus 3 to pick up over the next couple of weeks given a late-May launch is claimed, but for now, we would predict the OnePlus 3 will arrive with 5.5-inch display, Qualcomm's SD820 processor, either 4GB or 6GB of RAM and USB Type-C. A 3000mAh battery and AMOLED display have also both been suggested.
READ MORE OnePlus 3: What's the story so far?
Samsung Galaxy Note 6/7
The Samsung Galaxy Note device usually launches in the second half of the year and based on the rumours, it looks like the Note 6 will follow the pattern. Before the Note 5, the range debuted at IFA in September, but after 2015's model appeared in August, speculation suggests the Note 6 will also be August, ahead of the trade show. Other rumours have suggested Samsung might even skip a generation name and go straight for Galaxy Note 7, so don't get too attached to the Note 6 moniker, it might not happen.
Rumours are suggesting there won't be any radical design changes from the Note 5 for the Note 6. Other rumors suggest it will essentially be a S7 Edge lookalike with an S-Pen. It is thought the new phablet will come with IP68 water and dust resistance though, just like the recently launched Samsung Galaxy S7 series and an iris scanner has also been touted, but we'd take this with a pinch of salt for now.
It has been claimed the Note 6 will offer a 5.8-inch Quad HD display, which would be a slight increase on the Note 5. Other rumours suggest a 12-megaixel snapper, which would be the same resolution as the recent flagships, both of which have been praised for their camera capabilities. There has also been talk of 6GB of RAM and storage options of 64GB and 128GB. No mention on whether microSD will be reintroduced like it was for the S7 and S7 edge yet though.
Apple iPhone 7 / iPhone 7 Plus / iPhone 7 Pro
As sure as the sun rises, there will be an iPhone 7. It's likely to stick to the same launch cycle as it has done previously, and won't appear until October 2016.
That hasn't stopped the rumours circulating though. The iPhone 7 is said to be ditching the headphone socket. This isn't a new idea and it's one of the oldest components on the handset, taking up a lot of internal space - space that could be filled with more battery or unicorn tears. The Lightning connector already supports audio, so it's not too far fetched.
We'd expect a new design, as the 6 and 6S share the same looks, and Apple updates the iPhone design on a two-year cycle, although it has been claimed the design change may not be too radical this time. If true, it goes along with speculation that Apple maybe be leaning towards a new 3-yearly cycle for major design changes.
Waterproofing has been suggested, as well as a similar design to the iPhone 6S but with the removal of the antenna strips across the back, as well as a camera lens that sits flush with the metal. There has also been a suggestion that there could be a different model, going by the name of the iPhone 7 Pro, that could see a dual-camera setup, along with the Smart Connector from the iPad Pro range introduced.
It will launch with iOS 10 (we can easily predict along) with more powerful hardware. As for new features, we suspect Apple will want to refine the camera experience and work on increasing the functionality of the 3D Touch display.
READ MORE Apple iPhone 7: What's the story so far?
Moto Z and Moto Z Force (2016)
Lenovo recently unveiled its latest flagship Moto-branded phones at its Tech World event in San Francisco, and it looks like we’re going to have to wait until at least September before these phones become available to buy. But if you can wait, it may well be worth it. From a spec standpoint they look great, and the modular backplate system looks far better than what we’ve seen from LG.
The regular Moto Z is undoubtedly the more fashion-focused smartphone of the two, and is impressively slim at just 5.2mm. The Moto Z Force, on the other hand, is 7mm thin, which is still pretty thin for a big smartphone. Battery size is the biggest reason for the difference in thickness, with the Z Force boasting a large 3500mAh battery that could get you well into a second day on a full charge. The regular Z has 900mAh less, with its 2600mAh one-day battery.
There are two other key differences between the two phones. First: the Force has a ShatterShield display, meaning you won’t be able to break it by dropping, or even throwing it on the floor. The Force also happens to have a much higher resolution camera with its 21MP sensor, versus the Moto Z’s 13MP camera. Both equipped with f/1.8 lenses, which means you should get great low light shots and be able to create lots of background blur.
Apart from that, they’re both the same. They have the most powerful Snapdragon available inside, with 4GB RAM, and 5MP cameras on the front as well as a fingerprint sensor and a USB Type-C connector on the bottom edge. Screens are the usual flagship affair: 5.5-inches with Quad HD resolution.
Of course, the biggest point of interest is the modular system which allows you to switch out the backplate for one of many different colours and finishes, or even add a magic module with a bespoke feature. For now, those include the likes of a JBL speaker, a pico projector and some battery packs.
We don’t have any specific release date or pricing information yet, but Lenovo will reveal those closer to the time they’re due to land on store shelves.
Sony's next flagship
There are few smartphone updating machines quite as determined as Sony Mobile. The Xperia Z3+ was only on sale for a few months before the launch of the Xperia Z5 family. Before MWC 2016, there were rumours of the next step, the Xperia Z6. They will probably stop now though as Sony confirmed the "Xperia Z line has reached its culmination".
The company announced the X series at Mobile World Congress, which is said to "represent a new chapter and evolution" of Sony Mobile's product strategy. The X Performance was originally announced as an Asia-only device, although this appears to have now changed, but it is flagship material bringing a lovely metal design with a glass front, coupled with a similar design to the Z5 but improved specs including the SD820 chip.
Rumours suggested the Xperia Z6 would appear in the second half of 2016. We suspect this is still likely but it won't be the Z6, it will just be Sony's next flagship. Have a good look at the Xperia X series because the Performance is what we suspect Sony's next flagship will base itself on.
Google could be set to change the way its Nexus phones are made, taking control from hardware manufacturers. That could mean that the next Nexus could be more like a Pixel, with Google exerting end-to-end control. This tighter grip on hardware is also down to the recently-announced Daydream VR which requires handsets to have powerful enough sensors, processors and fast enough displays to ensure a quality VR experience.
Until now the Nexus smartphones have been created by hardware manufacturers with experience in the area. It's been a showcase of different manufacturer's skills. Sources talking to The Information claim that Google is looking at designing the hardware as well as the software in future. This will effectively make the smartphone manufacturer a contractor, rather than a partner in the project.
The Information reports that some of the larger brands are unlikely to bend the knee to Google willingly, but the company might find a compatriot in HTC. There are already rumours that HTC is in talks with Google about making future Nexus hardware, supposedly a contract has been signed for the next three years, and we also know that LG won't be involved in the next Nexus. There aren't many more details to go on, although Evan Blass has claimed that HTC will be the manufacturer and the devices are being called M1 and S1 internally, which Android Police says refers to Marlin and Sailfish.
Google usually releases its Nexus handsets towards then end of the year, around September so expect more rumours over the coming months.
READ MORE Next Nexus: What's the story so far?
BlackBerry Rome / Hamburg
No soon had BlackBerry announced the Priv - it's first Android handset - another model appeared, codenamed Vienna. Rumours surrounding this model have since died down however, with new reports confirming BlackBerry will launch two mid-range Android smartphones instead.
It's not clear if Vienna has been ditched entirely, but the new devices are codenamed Rome and Hamburg. John Chen, BlackBerry's CEO, said the upcoming new devices will include a keyboard-equipped model and a full-touch model. Based on leaks, it is thought the Hamburg will be the full-touch model while Rome will be the keyboard model.
Rome is also rumoured to feature a Priv-like curved-screen OLED panel, while based on the leaked images, Hamburg seems to have a large lower speaker. The BlackBerry Hamburg is said to be within the $400 price point, confirming a mid-range target. Both devices will run on Android as BlackBerry confirmed it would be releasing no more BB10 OS devices.
READ MORE BlackBerry news
Microsoft Surface Phone
The Surface Phone is something of a Windows phone holy grail. With Nokia then Microsoft Devices producing plenty of Windows Phones, the spectre of the Surface Phone has been hanging around as the idea of the ultimate Windows mobile device. Given the recent sale of virtually all of its phone patents, and announcement that it's no longer focussing on Windows Phone development, the Surface Phone may never see the light of day.
It's rumoured that the new premium device will be Surface branded and Intel powered, possibly coming in three different variants. Given the same team behind the Surface Tablets are said to be behind the Surface Phone, you can expect a solid build if it ever does appear.
There's also the suggestion that Surface Phone will run a brand new update of Windows 10, aiming to capitalise on the branding and offer the ultimate experience. Launch originally wasn't expected until the latter half of 2016, but this has since shifted to beginning of 2017. That's if it appears at all.
Sony Xperia X Performance and XA Ultra
Sony announced a range of smartphones at Mobile World Congress called the X Series. There were originally three devices within the Sony X series including the X, XA and X Performance, but the company has since added the XA Ultra to the line up. Both the X and XA are on the market now, but we're still eagerly awaiting news of the X Performance and the larger XA Ultra's retail launches.
The Sony Xperia X Performance has the highest spec of the device and is easily the current flagship phone with waterproofing and the Snapdragon 820 processor on board. There's also a full HD 5-inch display, 3GB of RAM and 32GB of internal storage with microSD expansion, as well as a fingerprint sensor, just like the Z5, and a 23-megapixel rear camera, 13-megapixel front camera and a 2600mAh battery.
The XA Ultra is a larger version of the XA, which boasts 1920 x 1080 resolution in an edge-to-edge display spread across 6-inches. Like its smaller sibling, the XA, the Ultra has a Mediatek processor powering it, but has 3GB RAM and 16GB internal storage which can be expanded by MicroSD card. Despite its size, it only has a 2,700mAh battery which may be enough for a smaller phone to last a day or two, but doesn't sound quite enough for such a big phone.
The Xperia X Performance, Xperia X, Xperia XA and Xperia XA Ultra all feature metal and glass designs following the same cues as other Xperia devices. They will be available from Summer 2016. Availability and pricing of the X Performance has yet to be revealed but the X will arrive on 20 May for £499, the XA will arrive on 10 June starting at £239 and the XA Ultra will hit shelves in July, although no pricing has been detailed for this model either yet.
Xiaomi Mi 5
The Xiaomi Mi 5 is the Chinese company's latest flagship smartphone, announced at MWC. It's not clear if or when it will make an appearance in the UK, US or Europe but it has been released in the Chinese and Indian markets and it is available to buy on a range of Chinese sites.
The Mi 5 sports a premium design with a metal core and a 3D glass or ceramic rear for a beautifully slick finish. It measures 144.55 x 69.2 x 7.25mm and weighs just 129g, making it one of the lightest smartphones out there, especially with a glass back.
There is a 5.15-inch display with a 1920 x 1080 pixel resolution for a pixel density of 427ppi and it features the Qualcomm Snapdragon 820 chipset, supported by 4GB of RAM on the Pro version and 128GB of internal storage. There is also a regular version that will offer 32GB or 64GB of storage with 3GB of RAM but neither have microSD.
A 3000mAh battery is on board, along with a 16-megapixel rear camera and dual-tone flash, as well as a 4-megapixel front camera.
READ MORE Xiaomi Mi 5 first preview
Acer Predator 6
Acer announced the Predator 6, a high-end smartphone aimed at gamers, during its pre-IFA 2015 press conference. The device has a 6-inch screen and deca-core MediaTek processor - that's 10-cores of power - and there is 4GB of RAM in order to play console-style games when on the move.
There's a 21-megapixel camera on the rear, four speakers and haptic feedback when held in portrait mode to help simulate joypad controls on the touchscreen. The Acer spokesperson on stage said it would "dominate any mobile games you can throw at it".
Few other details have been released about the phone so far, but it joins a whole family of gaming products from Acer, all of which come under the Predator banner. A Predator 8 tablet was announced earlier in 2015 and the high-end smartphone has much of the same functionality. We will keep you updated.
READ MORE Acer Predator 8 hands-on
Google Project Ara
Originally created by Motorola, and now part of Google's ATAP division, Project Ara looked dead in the water until the company gave it some renewed attention at Google I/O 2016.
Although Project Ara started as a concept for allowing users to swap out literally every part of the phone's hardware, it's now a lot tamer, more fun and is actually heading to market in the next year. Although you won't be able to remove the display, or switch out its main battery, processor, memory or storage, there will be a ton of useful modules.
Some modules will be purely fashion-focussed, while others will offer better camera or audio quality. There will be kickstands, secondary displays, extra battery power, expandable storage, glucometers and much more.
Developers can register now and receive a developer kit from the end of this year, and a consumer version is targeted for launch in 2017.