HTC today announced its brand new HTC One - the HTC One M9. The HTC One M9 will be released in the UK on 31 March 2015, and we brought you live coverage of the launch which you can watch again on this page. You can find all the up-to-date details here: HTC One M9 price, specs, design and features.

New features in HTC One M9: HTC One M9 details

The HTC One M9 retains much of the design and style of its successful predecessors, the HTC One M7 and the HTC One M8. HTC has upgraded to a Qualcomm Snapdragon 810 64-bit processor and 3GB of RAM. There's 32GB of on-board storage and a microSD card slot like before. Like those previous HTC smartphones, the HTC One M9 is mostly made of metal and glass. It has a 5in Full HD screen with a resolution of 1920x1080 offering a pixel density of 440ppi. Sharp enough, you'd think. (Read next: Best new smartphones coming in 2015. See all MWC 2015 top stories.)

The HTC One M9 has a new 20Mp rear camera. It can record video in 4K resolution, according to HTC, and uses a 'dynamic exposure algorithm' to mimic the human eye. The front camera on the M9 is the same hardware as was the rear camera from the M8, which means it has a 4Mp resolution.

As before the new HTC One has so-called BoomSound front-facing stereo speakers, and the M9 now has Dolby Audio. Turning to the software, this Android Lollipop phone comes with Sense 7.0 which now has Themes so you can customise the interface to a deeper level including icons and font. You can even generate a theme from a photo. Also see: HTC One M9 review.

HTC One M9 release date, price, specs

HTC One M9 specification

    Android 5.0 Lollipop with Sense 7.0
    5in Full HD screen
    Qualcomm Snapdragon 810 processor, 64-bit
    3 GB RAM
    32 GB storage, microSD card slot (up to 128 GB), 100 GB Dropbox cloud storage
    20 Mp rear camera
    4 Mp UltraPixel front camera

HTC One M9: what we think

We have spent some time with the new HTC One M9, and our smartphone reviewer Chris Martin had the following to say:

"There may not be massive jumps in the technology in the HTC One M9 but the smartphone remains very desirable with premium design and build quality. It's good to see the Snapdragon 810 and more memory and a 5in we don't think HTC needed to jump to a Quad HD resolution.

"In itself, the M9 is a decent smartphone but M8 users won't really need to upgrade and it remains to be seen how it will compare to the Galaxy S6 and other new flagships such as the Sony Xperia Z4 and LG G4." Get the full story here: HTC One M9 review.

HTC One M9 release date, price, specs

What else did HTC announce?

HTC also announced the Grip, a fitness wearable. More exciting, is the Vive: a virtual reality headset made with games distribution company Valve. The HTC Vive will be launched for consumers this year, HTC says.

HTC One M9 launch live stream: what we thought HTC would announce today

Here is what we wrote before the event:

It is confirmed that HTC will launch a 'new HTC One' at this afternoon's event in Barcelona Spain. However, it is likely that the new HTC One will have a slight name change, either to 'HTC One Hima' or 'HTC Hima'.

The new flagship HTC Android will launch to consumers this month, with a Windows version to follow later in the year. We expect the initial price to range between £500 and £600, but drop back sharply after launch. And we already know that many UK networks and resellers will offer contract deals on the new HTC One M9 Hima.

Design-wise the new HTC One looks similar to previous models - as well it might. The HTC One range is a byword for style and build quality, offering classic metallic build in a slim and well put together shell.

We expect that the HTC One M9 will have a full- rather than Quad-HD screen. The HTC Hima will likely pack a 5in 1080p Super LCD3 display and Snapdragon 810 chip. The latter offers an octa-core processor with 4 Cortex-A57 cores at 2.0GHz and 4 Cortex-A53 cores at 1.5GHz, Adreno 430 GPU and 3GB of RAM. Expect 16-, 32- and 64GB storage options. This is a high-spec flagship smartphone.

Tune in later today to find out how right we are!

HTC One M9 release date, price, specs

What is the HTC One M9?

The HTC One M9, as the name suggests, is the successor to the original HTC One (the M7) and more recent HTC One M8.

As with most smartphones, there have been various leaks about the M9 ahead of its official unveiling. The rumour mill suggests that the device will stick with a 5in Full HD screen, employ the Qualcomm Snapdragon 810 processor and bump the camera to 20 Mp while dropping the Duo Camera setup.

It's also rumoured to have a very similar design with two-tone colours and Android 5.0 Lollipop with Sense 7.0. Read more about the rumoured HTC One M9 price, specs, design and features.

What else will we see at HTC's MWC 2015 press conference?

Although the HTC One M9 will be the star of the show, HTC might be announcing some other new products on Sunday. For starters there could be other versions of the M9 as a larger model like the iPhone 6 Plus has been pictured and a mini version is now a tradition in the smartphone world.

HTC will also likely announce its first wearable device at long last in partnership with UnderArmour. It's currently known as the Petra or One Wear, will have a focus on fitness and will use a curved screen.