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.
You can find those in our Best smartphones 2015: The best phones available to buy today feature. If your budget is a little smaller, there is also our Best budget smartphones 2015: 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.
HTC One A9
HTC is planning to release another handset in 2015. HTC chair and CEO Cher Wang confirmed that there would be a new "hero product" launched in the smartphone category in October 2015. This phone is codenamed Aero, or Hima Aero, and will launch under the name HTC One A9. An event has been scheduled for 20 October so we expect to see an official announcement then.
Although it has been described as "hero", many of the specs suggest that it's hero in its slim design, rather than in its hardware. It has been suggested it will measure 7mm thick and come in six colours. There have been several reports surrounding the specs, all of which contradict each other. The Qualcomm SD820 has been suggested, as has the MediaTek Helio X20 10-core processor and the Qualcomm Snapdragon 617 chipset.
A 3500mAh battery has been reported but so has a 2150mAh battery. In terms of display, we have seen claims of a Quad HD display, as well as a 5-inch Full HD display so nothing is clear here either. But reports suggest this is a mid-range device, rather than the hero that many are calling for.
One thing that seems to be a little more certain is the software after HTC said it would be the first to launch a device running Android 6.0 Marshmallow after it announced the 20 October launch date.
BlackBerry has confirmed it is working on an Android handset that will be called Priv and the company has said it plans to release it before the end of the year.
Official photos released by BlackBerry show the Priv to be rather slender from side on, despite the separate keyboard and screen piled on top of each other. Leaked videos appear to show that the BlackBerry Priv will have the same sort of weave to the rear as we saw - and loved - on the Q10, but highly polished.
The current school of thought is that Priv will feature a 5.4-inch display with curved edges and a resolution of 2560 x 1440 pixels. It is said to be powered by a 1.8GHz 64-bit hexa-core Snapdragon 808 processor supported by 3GB RAM and 18-megapixel rear, and 5-megapixel front-facing cameras have also been suggested.
It has been claimed the BlackBerry Priv is will land in November, with rumours suggesting 16th as the date, fully equipped with Android.
READ MORE BlackBerry Priv: What's the story?
OnePlus has only recently announced the OnePlus 2 but it appears that the company won't be stopping there for this year after confirming it would definitely be releasing a new device before Christmas.
The new OnePlus phone, which could be called Mini, was confirmed by the company's co-founder Carl Pei but it looks like it won't be all about power like other OnePlus devices and instead the focus will be turned to design. India GM, Vikas Agarwal, told the Economic Times that the device would be a global release but mainly aimed at India.
The OnePlus Mini has already leaked, revealing potential specs but whether it is the same handset as the one confirmed by the company is not clear. The Mini is expected to come with a 1080p display of unknown size, a 2.2GHz octa-core processor and 2GB of RAM plus 32GB of storage and a 13-megapixel camera.
READ MORE OnePlus news and reviews
Samsung Galaxy S7
Moving into what phones to look forward to in 2016 and you'll find rumours for the Samsung Galaxy S7. The device has been codenamed Project Lucky and two models are expected, referred to as Hero and Hero2.
The current leaks suggest that you can expect a 5.2-inch device and a 5.8-inch device, but there have also been reports of a 5.7-inch device with a Quad HD display. SamMobile claims one of the devices will have a flat display, while the other will have a dual-edged curved display. In terms of processor, rumours suggest Samsung will stick to Exynos in one device and put the Qualcomm SD820 in the other.
There have also been reports of 3GB of RAM and 4GB of RAM, as well as a 16-megapixel rear camera and a 5-megapixel front camera. According to SamMobile though, Samsung is testing a dual-camera setup in some prototypes as well as a 20-megapixel ISOCELL sensor. Take everything with a pinch of salt for now as there will be plenty more rumours over the next few months surrounding the Galaxy S7.
Microsoft Lumia 950 and Lumia 950 XL
Microsoft unveiled new flagship hardware for Windows 10 for Mobile at an event in NYC, giving birth to the Lumia 950 and the Lumia 950 XL.
The Lumia 950 will come with a 5.2-inch display while the Microsoft Lumia 950 XL features a larger 5.7-inch screen. Both offer a 2560 x 1440 resolution, so will be nice and sharp. Both feature and AMOLED display.
Both also have a 20-megapixel PureView camera and USB Type-C, as well as Qi wireless charging. The Lumia 950 comes with the Qualcomm SD808 chip, 3GB of RAM and 32GB of storage, as well as a removable 3000mAh battery. The Lumia 950 XL bumps up the specs slightly with the SD810 chipset and a 3340mAh battery.
There's a load of innovative features in the new Windows 10 software too, the most impressive of which is Continuum, letting you dock your phone and use it as a desktop PC. Microsoft's one platform dream has now become a reality.
The LG V10 was announced at an event in New York on 1 October and it marks the first Android phone in a new line of "V" smartphones that the South Korean company is currently planning.
The V10 features a Qualcomm Snapdragon 808 processor, a removable 3000mAh battery and the same 16-megapixel camera as the LG G4 but with full manual video controls. There is a 5.7-inch Quad HD main display, coupled with smaller secondary 160 x 1040 display to show essential information.
You'll also find two 5-megapixel selfie cameras, one of which has an 80-degree field of view, while the other has 120, designed to offer wider-angle selfie shots without a stick. This "V" range is said to be all about premium specs and materials and the V10 boasts a 316L stainless steel frame with additional reinforcement around the corners for MIL-STD-810G Transit Drop Compliant shock resistance.
LG has said that the V10 will be launching in Korea, followed by United States, China and key countries in Asia, Latin America and the Middle East. No pricing or release date has been announced as yet.
READ MORE LG V10 hands on
Google announced two Nexus devices during an event in San Francisco on 29 September, one of which was the Huawei-made Nexus 6P.
The Nexus 6P is a 5.7-inch QHD phablet that will succeed the current Motorola-made Nexus 6. It sports a Qualcomm Snapdragon 810 processor, 3GB of RAM and a 3450Ah battery under the hood, along with USB Type-C and a full metal body. The rear camera sits at 12.3-megapixels, while the front is 8-megapixels and there is a fingerprint sensor on the rear too.
The Nexus 6P will debut the latest version of Android - 6.0 Marshmallow - and it will start at £449 for a 32GB model. No microSD support is featured so if you need more storage, you'll be looking at £499 for the 64GB model and £579 for the 128GB model. Pre-orders have started but the exact shipping date is still unknown.
READ MORE Nexus 6P: What's the story so far?
The second Nexus announced by Google on 29 September was the LG-made Nexus 5X, which replaces the two-year old Nexus 5.
The Nexus 5X features a 5.2-inch Full HD display, along with the Snapdragon 808 processor and a battery capacity of 2700mAh. It has a plastic body rather than metal like the Nexus 6P, but it does offer the same rear camera capabilities and there is USB Type-C and a fingerprint sensor on board the Nexus 5X too.
Like the Nexus 6P, the Nexus 5X will debut with Android 6.0 Marshmallow. Pre-orders are now open in the US, UK, Japan and Ireland with shipping expected on 16 October. The 16GB model will cost £339 and the 32GB will set you back £379.
READ MORE Nexus 5X official
Sony Xperia Z5 Compact Premium
While it wasn't announced with its Xperia Z5 siblings at IFA, there has been some speculation suggesting that Sony will also be releasing a Xperia Z5 Compact Premium in Japan.
It is rumoured to feature a 4.6-inch display with a Full HD resolution, which would already be a step up from the current Xperia Z5 Compact, and 4GB of RAM has also been suggested. A 23-megapixel rear snapper, 5-megapixel front snapper, 2900mAh battery and Snapdragon 810 processor are also claimed.
CNBeta said the device would be available in October, but provided no details on pricing. The accompanying promotional image suggests it will be exclusive to Japanese carrier DoCoMo however. We will update this feature if Sony announces anything official.
READ MORE Sony hub
Nextbit announced its first smartphone at IFA 2015 - the Nextbit Robin - described as a cloud-first Android device. The Nextbit Robin wants to shake up both hardware and software, taking Android deeper into the cloud with a unique storage management approach.
The unique selling point of the Nextbit Robin is how it manages storage. The device comes with 32GB of internal storage, but has 100GB of cloud storage too. It works seamlessly with the cloud using that space to backup and offload the content of your phone and this doesn't just include photos and videos, but apps and data too.
Nextbit will sync your apps with the cloud, meaning it can free-up local storage as it's needed. That means you won't run out of storage when you need it, for example taking photos or video on a day out. It does this by backing up to the cloud at convenient points - at night when connected to Wi-Fi and a charger, for example.
The software recognises the apps you use regularly, so keeps them on the device, but, for example, if you rarely use a travel app, it will let that space be over-written with other data. The real magic is that when you want that app back again, it can be seamlessly restored to your device with all the data in place, and no need to login again.
The Nextbit Robin is on Kickstarter to help demand planning but it will hit general retail in Q1 2016, for $399 (£260) and will be available internationally.
READ MORE Nextbit Robin news
Acer Predator 6
Acer announced the Predator 6, a high-end smartphone aimed at gamers, during its pre-IFA 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 this year and the high-end smartphone has much of the same functionality. We will keep you updated.
READ MORE Acer Predator 8 hands-on
Sony Xperia Z5 family
Sony launched not just one but three flagship smartphones at IFA in Berlin - the Xperia Z5 Compact, Xperia Z5 and the Xperia Z5 Premium. All three stick with the tried and tested OmniBalance design and waterproofed bodies, but Sony has added a fingerprint sensor to the signature side power button on all three models.
The Z5 Premium comes with a 5.5-inch display, while the Z5 sticks with 5.2-inches and the Z5 Compact has a 4.6-inch offering. The resolutions all differ too, with the Z5 Premium featuring the world's first 4K display on a smartphone for a whopping 806ppi, while the Z5 sticks with 1080p like the Xperia Z3+ and the Z5 Compact keeps with 720p.
In terms of other specs, they all come with an improved camera. The Z5 family feature a 23-megapixel rear snapper with a super fast autofocus of 0.03 seconds and a 5-megapixel front snapper. The Xperia Z5 Premium is the most exciting of the three, featuring a very excessive mirror finish, alongside black and gold options. It will launch in November, while the other two will be available from October.
READ MORE Sony hub
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 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.