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 already in full swing for the next OnePlus device - the OnePlus 3.
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" and appear by the next quarter, which would suggest around June.
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 Qualcomm's SD820 processor, 4GB 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?
Motorola Moto X (2016)
Motorola announced three Moto X devices in July of 2015 but rumours for the successor have already started, with 9 June claimed to be a potential date to put in the diary. Chinese website Wapvnet leaked an image claiming to be the new Moto X 2016 device featuring an all-metal body, which wouldn't be a completely unreasonable suggestion.
The image presented a raised and larger rear camera lens and it has been supported by several renders showing a similar design. According to serial leakster Evan Blass, there will be two models of Moto X, called Vertex and Vector Thin. It has also been suggested Motorola will ditch the X branding and move to Moto Z instead, the opposite of what Sony did earlier this year.
We'd expect improvements in most areas with the new model as this tends to be the way so a faster processor, more RAM, microSD support, a larger battery capacity and the latest software would all be reasonable predictions. We'd also expect the camera to be a big consideration as it was in 2015.
Samsung Galaxy Note 6
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.
Rumours are suggesting there won't be any radical design changes from the Note 5 for the Note 6. It is thought the new phablet will come with IP68 water and dust resistance though, just like the recently launched Samsung Galaxy S7 and S7 edge 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.
Sony Xperia Z6 / 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.
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. 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?
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.
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.
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.
Motorola Moto G4 / G4 Plus (2016)
Motorola officially announced the fourth generation of Moto G handsets at an event on 17 May. The Moto G4 and Moto G4 Plus are the same size and weight, but the G4 Plus has a couple of extra features including a fingerprint sensor.
Both devices offer a 5.5-inch Full HD display protected by Gorilla Glass 3 for a pixel density of 400ppi. The design offers curved edges and a polycarbonate rear and they both feature the Qualcomm Snapdragon 617 chip under their hoods, backed by 2GB of RAM. There looks like there will also be a 3GB model though.
The G4 Plus has a fingerprint sensor on the front, along with a 16-megapixel rear camera compared to the G4's 13-megapixel snapper. The G4 Plus also offers laser AF and phase section AF combined. The Moto G4 will be available early June for £169, while the G4 Plus will be an Amazon exclusive and be available mid-June for £199.
Sony Xperia X series
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.
The Sony Xperia X Performance has the highest spec of all three, with waterproofing and the Snapdragon 820 processor on board. The Xperia X follows with a 5-inch Full HD display, Snapdragon 650 processor, 3GB of RAM and 32GB of internal storage with microSD expansion. There is a fingerprint sensor on board like the Z5 and it also features a 23-megapixel rear camera, 13-megapixel front camera and a 2600mAh battery.
The Sony Xperia XA has a 5-inch display too and although it has a lower resolution at 1280 x 720, it has an edge-to-edge screen, making it a little more exciting. The XA Ultra is a larger version of this device, also offering an edge-to-edge display but in 6-inches. Both the XA and XA Ultra have MediaTek processors, with the XA supported by 2GB of RAM and the XA Ultra offering 3GB of RAM. Both have 16GB of storage and microSD support, but neither have a fingerprint sensor or waterproofing.
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
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 sometime in 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.