The Mobile World Congress conference has kicked off in Barcelona, with an absolutely enormous Samsung mobile phone-tablet hybrid among the first announcements.

Samsung's Galaxy Note 8.0 was unveiled on Sunday, an eight-inch mobile device which still works as a mobile phone.

The almost hilariously-huge device is seen by observers as a 'brand play' if nothing else, emphasising the South Korean tech giant's ability to iterate quickly on its successful releases and provide its customers with a variety of choices.

It also comes with a quad-core processor, a 1,280 x 800 pixels screen and Samsung's 'S-Pen' stylus input.

But Samsung also had a surprise up its sleeve, revealing that its next flagship phone, the Galaxy S4, will be announced in New York on March 14.

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    A man holds Huawei's new smartphone 'Ascend P2' after a press conference in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / JOSEP LAGO (Photo credit should read JOSEP LAGO/AFP/Getty Images)

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    Huawei's Consumer Business Group Chief Executive Officer (CEO) Richard Yu presents his company's new smartphone 'Ascend P2' during a press conference in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / JOSEP LAGO (Photo credit should read JOSEP LAGO/AFP/Getty Images)

  • SPAIN-TELECOM-MOBILE-WORLD-CONGRESS

    A woman takes pictures in front of the Mobile World Congress in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / LLUIS GENE (Photo credit should read LLUIS GENE/AFP/Getty Images)

  • SPAIN-TELECOM-MOBILE-WORLD-CONGRESS

    People take pictures of Huawei's new smartphone 'Ascend P2' after a press conference in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / JOSEP LAGO (Photo credit should read JOSEP LAGO/AFP/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: Drivers wait for their Mobile World Congress 2013 attendees at the Barcelona - El Prat Airport on February 24, 2013 in Barcelona, Spain. Airport Authorities are expecting an increase of more than 100,000 people passing though Barcelona's airports between February 22 and March 4, coinciding with the hosting of the Mobile World Congress 2013. (Photo by David Ramos/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: Drivers wait for their Mobile World Congress 2013 attendees at the Barcelona - El Prat Airport on February 24, 2013 in Barcelona, Spain. Airport Authorities are expecting an increase of more than 100,000 people passing though Barcelona's airports between February 22 and March 4, coinciding with the hosting of the Mobile World Congress 2013. (Photo by David Ramos/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: Workers finalize the last details ahead the opening day of the Mobile World Congress 2013 at the Fira Gran Via complex on February 24, 2013 in Barcelona, Spain. 70,000 visitors will visit the Mobile World Congress 2013 where 1,500 exhibitors will present the last wireless communication technologies. The congress runs from Frebuary 25 through February 28. (Photo by David Ramos/Getty Images)

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    People walk outside the Mobile World Congress in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / LLUIS GENE (Photo credit should read LLUIS GENE/AFP/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: A visitor works on his computer the day before of the Mobile World Congress at the Fira Gran Via complex on February 24, 2013 in Barcelona, Spain. 70,000 visitors will visit the Mobile World Congress 2013 where 1,500 exhibitors will present the last wireless communication technologies. The congress runs from Frebuary 25 through February 28. (Photo by David Ramos/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: A visitor takes pictures at the main entrance of the Mobile World Congress 2013 at the Fira Gran Via complex on February 24, 2013 in Barcelona, Spain. 70,000 visitors will visit the Mobile World Congress 2013 where 1,500 exhibitors will present the last wireless communication technologies. The congress runs from Frebuary 25 through February 28.(Photo by David Ramos/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: A visitor sits on a Barcelona sign at the main entrance of the Mobile World Congress 2013 at the Fira Gran Via complex on February 24, 2013 in Barcelona, Spain. 70,000 visitors will visit the Mobile World Congress 2013 where 1,500 exhibitors will present the last wireless communication technologies. The congress runs from Frebuary 25 thorough February 28. (Photo by David Ramos/Getty Images)

  • Mobile World Congress 2013 - Previews

    BARCELONA, SPAIN - FEBRUARY 24: Workers leaves the Fira Gran Via complex after finishing the last details ahead the opening day of the Mobile World Congress 2013 at the Fira Gran Via complex on February 24, 2013 in Barcelona, Spain. 70,000 visitors will visit the Mobile World Congress 2013 where 1,500 exhibitors will present the last wireless communication technologies. The congress runs from Frebuary 25 through February 28. (Photo by David Ramos/Getty Images)

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    A group of cyclists ride past the Mobile World Congress in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / LLUIS GENE (Photo credit should read LLUIS GENE/AFP/Getty Images)

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    People wait to attend the press conference of Mozilla's Chief Executive Officer (CEO) in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / JOSEP LAGO (Photo credit should read JOSEP LAGO/AFP/Getty Images)

Also making an early announcement at this years show was HP, who unveiled their return to making mobile devices.

The HP Slate 7 is a low-cost Android tablet in the style of the Nexus 7, with a 1,024 x 600 pixels display and a dual-core A9 processor.

Hauwei showed off the Ascend P2, which it said was the world's "fastest" mobile device, with a 4.7-inch screen and a 13 megapixels camera.

Meanwhile Mozilla has made a host of announcements about its Firefox Operating System including some of the first hardware that will run the new OS.

CEO Gary Kovacs said that the company was looking at 2014 as a potential release date for a device in the US, but that Brazil, Mexico and Spain would come first.

They include the ZTE Open and the Alcatel One Touch Fire.

Nvidia have been demonstrating their new Tegra 4i mobile chipset, while PowerbyProxi has shown of its new wireless charging solution.

Nokia and Sony will be among the companies making early announcements on Monday.