Mobile World Congress 2017 saw a whole stack of new smartphones, tablets and other devices launched during its time in Barcelona.

Samsung, Sony, LG, Huawei, Nokia and other mobile manufacturers have announced gadgets for the coming months and we've been busy scouting them out to bring you all the details.

So here's everything you need to know about MWC 2017 and the smartphones, smartwatches and other devices appearing at the show.

Mobile World Congress is an annual trade show run by the GSMA. The location moves around Europe, but in recent years it has been held in Barcelona, Spain.

It is the launch platform for many of the year's big smartphones, but it has also given us a range of tablets, smartwatches and other connected devices in recent years.

Outside of the consumer sphere, it also draws in many of the industry heavyweights to talk about the future of mobile, like 5G, chipsets, VR and other technologies.

Mobile World Congress 2017 is running from 27 February to 3 March. These are the days that the show itself is open, the press days - where the big announcements are made - fell before this.

Sunday 26 February was the big launch day therefore and we saw many of the devices detailed below during that day.

In brief, here are the major phones launched at MWC 2017:

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BlackBerry has stopped making its own phones and has handed the license to TCL. The company held an early launch on 25 February to unveil a new handset, the BlackBerry KeyOne.

Previously known as Mercury, the BlackBerry KeyOne offers a touch and type arrangement, giving you a full Android experience through the display, paired with a traditional BlackBerry-style keyboard beneath it. It's like the Priv, but without the slide action. It's a new BlackBerry, in a new format, but it's one that might just work.

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Google always has a good time at MWC, using it as an opportunity to show off all its Android partners and at MWC 2017, it introduced the fun Android pin badges for attendees to collect.

But the real announcement was about Google Assistant, sharing the news that the service would be pushed out to all Android phones running Nougat or Marshmallow. This should mean that the majority of recent devices will be getting the service in the coming weeks.

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Huawei has a mixed history with MWC, often using the conference to launch new devices, but not always the new flagship, which often gets its own, large, launch event a month later.

However, this year it decided to use the event to unveil the Huawei P10 and P10 Plus smartphones, weighing in at 5.1 and 5.5-inches respectively. They both run on the latest Kirin 960 octa-core processor, and come with stacks of graphical power for palm-sized devices.

They also each come with Huawei's Dual Camera tech.

Huawei also announced the Huawei Watch 2, which runs on Android Wear 2.0 and comes in Classic and Sports formats. They also add GPS functionality, so you can go on a run without the need of a smartphone in your pocket. A Porsche Design Huawei Watch is also on its way.

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LG used its MWC press conference to exclusively unveil the LG G6 - much as we expected. It is a 5.7-inch 18:9 device with a 2880 x 1440 pixel resolution. It is also the first phone with Dolby Vision HDR support to offer better contrast and a wider colour gamut for video playback.

The processor is a Qualcomm Snapdragon 821, which is supported by 4GB of RAM so every indication is that it will move like the clappers. The rear camera is made up of two lenses with a 13-megapixel sensor. One of them is wide-angle.

Price and release date are yet to be revealed, but several networks have confirmed they will be carrying it.

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Motorola was rumoured to be unveiling the Moto G5 handset during owner Lenovo's press conference and it didn't disappoint.

The Moto G5 and Moto G5 Plus were both launched in the budget phone space, but with premium tech that belies their price point.

The G5 has a metal body, 1.4GHz Snapdragon 430 processor and 3GB of RAM. There's a 2,800mAh battery inside, plus a 5-inch Full HD display and 13-megapixel front camera. Its larger sibling has a 5.2-inch Full HD display instead, with a faster 2.0GHz octa-core processor and bigger 3,000mAh battery.

Prices start at just £169 for the Moto G5, so it seems that Motorola has done it again.

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Nokia's pre-show hype focused mainly on the return of an old favourite, the Nokia 3310, and the brand didn't disappoint.

Using the Nokia moniker, manufacturer HMD Global has reintroduced a simple feature phone with the same styling as the 2000 classic handset, but with a full colour screen and slimmer build. It looks the part but don't expect tech miracles - it's not even 3G so is basically just for calls, texts and, of course, Snake.

Along with the 3310, HMD Global has three Android phones releasing under the Nokia name. The Nokia 3, 5 and 6 are budget handsets, priced from just €139. They come in 5, 5.2 and 5.5-inch screen sizes respectively.

The Nokia brand is also to be used by, erm, Nokia, it has been announced. It will be releasing a range of new Withings fitness and health products under the name now that it owns the French tech firm.

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Oppo used MWC not to release a new phone, but to unveil a new smartphone camera technology. It's a system that allows for greater optical zoom to be packed into a slim smartphone body by flipping the lens through 90-degrees and using a prism to divert the light path.

That means you can cram more in as you're not restricted by the thickness of the phone. The Oppo 5x zoom system uses dual cameras and promises to get you closer to the action without losing quality. On first impressions, it seems to work.

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We didn't see this one coming. Porsche Design held a small gathering at MWC to unveil its first computer. The Porsche Design Book One is a premium Windows 2-in-1, offering full 360-degree flexibility and a detachable tablet display. It's packed with power, using an Intel Core i7 chipset, offering a range of attachments and coming with a pen for interaction with the display.

The Book One is also wonderfully plush, dripping in quality, which you'd expect for the €2795 asking price.

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Qualcomm underpins a lot of the technology in modern mobile devices and the company is looking to reinforce the position of Snapdragon 835 as the chipset of choice in mobile devices, including VR, which it demoed on its stand.

It made several other announcements during MWC 2017 too. It is working extensively on trials for 5G networks, partnering with different carriers and manufacturers to bring through the next generation for mobile data.

And Qualcomm has highlighted the rise is adoption of Bluetooth aptX HD for high resolution audio support.

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Samsung wasn't expected to announce the Samsung Galaxy S8 at Mobile World Congress 2017 - that is looking more likely to make an appearance at a separate event in March. Instead, it used its press conference on Sunday 26 February to launch the Galaxy Tab S3, a new premium Android tablet with an included S Pen stylus.

The company is also taking on Microsoft and the Surface Book with its own Galaxy Book 2-in-1 tablets/laptops. There will be two sizes available - 10.6 and 12-inches - and both Windows 10 devices come with a detachable keyboard to switch them between notebook and slates. They also come with Intel processors inside and can be used with an optional S Pen.

Finally, Samsung has unveiled a new version of the Gear VR headset which comes with a dedicated touchpad controller.

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Sony usually launches new smartphones at MWC and this year's event has been no different. It has announced four new handsets, with models in the premium and mid-range price brackets.

The Sony Xperia XZ Premium is top of the tree. It has a 5.5-inch 4K HDR display, 19-megapixel rear "Motion Eye" camera and a mighty Qualcomm Snapdragon 835 processor. There is also 4GB of RAM and 64GB of storage, along with water and dust proofing to a high standard.

The Sony Xperia XZs is an upgrade on the existing XZ and also sports the Motion Eye camera and 4GB of RAM. It's a 5.2-inch Full HD device, with a Qualcomm Snapdragon 820 processor and 2,900mAh battery.

The Sony Xperia XA1 and XA1 Ultra are mid-range handsets with 5-inch and 6-inch displays respectively. The XA1 has a 720p screen while the XA1 Ultra's is Full HD. They both have an impressive 23-megapixel rear camera however, and octa-core MediaTek processors.

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As explained under "Nokia" above, the Withings brand is being phased out and replaced by Nokia, now that the companies are one and the same.

A range of new health products and fitness trackers will be released under the Nokia brand in summer 2017.