Le groupe sud-coréen Samsung va mettre sur le marché fin avril son nouveau smartphone haut-de-gamme Galaxy S4, qu'il a présenté jeudi soir à New York et avec lequel il espère mettre encore un peu plus la pression sur l'iPhone de son rival américain Apple.

"Nous prévoyons de le lancer avec 327 opérateurs mobiles dans 155 pays à partir de la fin avril", a annoncé JK Shin, le responsable de la division de téléphonie mobile de Samsung, lors d'une présentation officielle au Radio City Music Hall, qui était également retransmise en direct à Time Square.

Le nouveau téléphone est "plus fin, plus fort" et "simplement incroyable", a-t-il assuré.

Il aura un écran plus grand que son prédécesseur le Galaxy S3, de 5 pouces (12,7 centimètres), un appareil photo plus performant, et sera disponible en versions compatibles avec la téléphonie mobile de troisième ou quatrième génération (3G ou 4G LTE).

L'important marché américain est l'un des rares où Apple vend encore plus de smartphones que Samsung.

Au niveau mondial, le sud-coréen a ravi la première place en 2011 et a conforté son avance l'an dernier en s'adjugeant environ 30% de part de marché contre 19% pour le groupe à la pomme.

Samsung a profité du succès de son précédent smartphone haut de gamme Galaxy S3, lancé en mai et dont il avait indiqué mi-janvier avoir vendu plus de 40 millions d'exemplaires.

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  • The Galaxy S4 Lockscreen

    The lockscreen on the Galaxy S4. Image credit: HuffPost/Jason Gilbert

  • The Galaxy S4 Homescreen

    The homescreen of the Galaxy S4. Here you can see that Samsung has reduced the "bezel" of the display, meaning that the glass stops closer to the horizontal edges of the phone. This allowed the screen to balloon to 5.0 inches from 4.8 inches without the device getting too much larger. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 Back

    The back of the Galaxy S4, with the 13 megapixel camera and flash. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 vs. Galaxy S3

    A Galaxy S4 on the left in white, and a Galaxy S3 in blue on the right. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 vs. Galaxy S3

    Another look; the Galaxy S4 is slightly larger than the Galaxy S3. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 vs. Galaxy S3

    Another view. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 vs. iPhone 5

    Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 vs. iPhone 5

    The display on the Galaxy S4 is now a full inch larger (in diagonal) than the iPhone 5. The iPhone 5 has a 4.0-inch display, while the Galaxy S4 has a 5.0-inch display. Image credit: HuffPost/Jason Gilbert

  • S Health

    The Galaxy S4 has a new app called S Health, which acts as a health diary for the owner. The phone can track your steps and you can input each meal, and the phone will calculate your calorie intake. Optional accessories -- like a fitness wristband, digital scale and sleep belt -- can also measure your blood pressure, weight and glucose levels for a total health diary. Image credit: HuffPost/Jason Gilbert

  • S Health

    Logging my morning coffee with the S Health app. No calories! Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 Side View

    The Galaxy S4 from the side. The S4 is 7.9 mm thick, or 0.3 mm thicker than the iPhone 5. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 Camera

    The 13 megapixel camera ships with a load of new features, including an option to simultaneously snap a photo of yourself with the front camera overlaid onto your subject taken with the rear camera. You can choose what shape your floating head appears as; here, I am inside a heart with GigaOM's Kevin Tofel. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 Camera

    The software of the Galaxy S4 camera has been overhauled to mimic the Samsung digital cameras shooting modes (on bottom). One new mode is called Eraser, in which the camera can detect an unwanted photobomber in the background by his or her movement and then automatically delete that person from that photo using other shots. Image credit: HuffPost/Jason Gilbert

  • S Translator

    Another new feature is S Translator, which can translate between 10 different languages. You can either input text via the keyboard or speak what you want translated into the microphone. Image credit: HuffPost/Jason Gilbert

  • Galaxy S Translator

    A big <em>ni hao</em> to all of my Chinese readers. Image credit: HuffPost/Jason Gilbert

  • Hover View

    Borrowing form the Galaxy Note, the Galaxy S4 can now detect when your finger is hovering over certain content and provide a preview of that content. Here, my finger hovers over an email and a preview of that email pops up on screen. Image credit: HuffPost/Jason Gilbert

  • Galaxy S4 Remote Control

    The Galaxy S4 contains an IR sensor to control the basic functions of your television. It also contains a channel grid so that you can tune to channels on your TV.<a href="http://www.technobuffalo.com/2013/02/22/htc-one-ir-blaster-sdk/" target="_blank">A similar feature was introduced on the HTC One earlier this year</a>.

  • Samsung's Galaxy S4

    Image credit: HuffPost/Jason Gilbert