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Sony Xperia U

Feb 26, 2012
Market status
Release date
May 7, 2012


No pros


  • Lacks microSD slot for storage expansion
  • Too little RAM memory (512 MB RAM)
  • Low-resolution camera (5 megapixels)




Sony Xperia U is a stylish and compact handset, and one of its biggest virtues seems to be customization. That is why the designers called it Xperia U, from well... "you". You can quickly swap the bottom cap in something of different color, if you are so inclined, to match your playful or business mood and time of the day. Not only that, but there is this color matching illuminated bar at the bottom, which is the trademark of the new "Iconic Identity" style of the upcoming Xperias. It is transparent, but yet full of LED light of different colors, and also houses the antenna for better connectivity.

Do you ...?



  • Device type:
    • Smart phone
  • OS:
    • PopupAndroid (4.0, 2.3.7)
  • Dimensions:
    • 4.41 x 2.13 x 0.47 inches (112 x 54 x 12 mm)
  • Weight:
    • 3.88 oz (110 g)
      the average is 5.1 oz (146 g)


  • Physical size:
    • 3.5 inches
  • Resolution:
    • 480 x 854 pixels
  • Pixel density:

    Pixel density - The pixel density of a display represents the number of pixels over an area of one inch. It’s measured in “pixels per inch”, or ppi. The higher the number, the more detailed and good-looking the display is.

    • 280 ppi
  • Technology:

    Technology - There are two main screen technologies currently used in phones and tablets: LCD and AMOLED. The former usually features a light source and liquid crystals, while the latter is based on organic light-emitting diodes. Newer LCD variations like IPS-LCD and Super-LCD allow for very accurate color reproduction and very wide viewing angles, where no significant image quality loss is observed. Current AMOLED screens differ in such a way that they can exhibit much more saturated colors (sometimes too much) and incredibly high contrast levels, which is due to black color being completely black in AMOLED displays.

    • TFT
  • Screen-to-body ratio:
    • 55.70 %
  • Colors:
    • 16 777 216
  • Touchscreen:
      • Multi-touch
  • Features:
    • Light sensor, Proximity sensor, Scratch-resistant glass


  • Camera:
      • Popup5 megapixels
    • Flash:
      • LED
    • Features:
      • Autofocus, Face detection, Digital zoom, Geo tagging
    • Shooting Modes:
      • PopupPanorama
  • Camcorder:
      • 1280x720 (720p HD)
    • Features:
      • Video light, Video calling
  • Front-facing camera:
      • 0.3 megapixels VGA


  • System chip:

    System chip - Most modern handsets use an advanced chip that includes many of the device’s hardware modules like the processor, Wi-Fi, Bluetooth and sometimes even the wireless radio. This field shows what particular system chip (or System-on-a-Chip) is used in the phone.

    • ST Erricson NovaThor U8500
  • Processor:

    Processor - The processor is the main computing component of a phone and is a major factor when it comes to the overall speed of the device. Some more powerful smartphones use dual-core and quad-core processors designed to deliver greater performance.

    • Dual-core, 1000 MHz, ARM Cortex-A9
  • Graphics processor:
      • ARM Mali-400 MP
  • System memory:

    System memory - System memory, or RAM memory is the type of memory that the device uses to temporarily store data from the OS or currently-running apps. The more RAM available to the device, the better the performance will be when multiple or heavier programs are running.

    • 512 MB RAM
  • Built-in storage:
    • 8 GB
  • Maximum User Storage:
    • 4 GB


  • Talk time:
    • 6.60 hours
      the average is 13 h (804 min)
  • Stand-by time:
    • 10.8 days (260 hours)
      the average is 17 days (409 h)
  • Talk time (3G):
    • 5.60 hours
      the average is 15 h (907 min)
  • Stand-by time (3G):
    • 19.7 days (472 hours)
      the average is 24 days (588 h)
  • Music playback:
    • 45.00 hours
  • Video playback:
    • 6.00 hours
  • Capacity:
    • 1320 mAh


  • Music player:
    • Filter by:
      • Album, Artist, Playlists
    • Features:
      • Album art cover, Background playback, Music recognition
  • Radio:
      • FM, Stereo, RDS
  • Speakers:
    • Earpiece, Loudspeaker
  • YouTube player:
    • Yes

Internet browsing

  • Built-in online services support:
    • Facebook, YouTube (upload), Picasa/Google+, Twitter


  • GSM:
    • 850, 900, 1800, 1900 MHz
  • UMTS:
    • 850, 1900, 2100 MHz
  • Data:
    • HSDPA 14.4 Mbit/s, HSUPA 5.76 Mbit/s, UMTS, EDGE, GPRS
  • Positioning:

    Positioning - This field shows the positioning systems supported by the device. There are three main types: GPS, A-GPS and GLONASS. GPS - This is one of the most widespread global positioning technologies, developed and maintained by the U.S. government. It uses satellites in order to detect your location. Works best in clear weather. A-GPS - A-GPS stands for Assisted GPS and is the industry standard for positioning and navigation. “Assisted” means that it can use local wireless networks, in addition to satellites, for quicker and more precise localization. GLONASS - GLONASS is a global positioning system, developed by the Russian Federation. It’s very similar to GPS, but isn’t so popular in cell phones.

    • A-GPS
  • Navigation:
    • Yes
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  • Bluetooth:
      • 2.1, EDR
  • Wi-Fi:
      • 802.11 b, g, n
    • Mobile hotspot:
      • Yes
  • USB:
      • USB 2.0
    • Connector:
      • microUSB
    • Features:
      • Mass storage device, USB charging
  • Other:
    • DLNA, Tethering, Computer sync, OTA sync

Other features

  • Notifications:
    • Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
  • Sensors:
      • Accelerometer, Compass
    • Voice dialing, Voice commands, Voice recording


  • Officially announced:
    • 26 Feb 2012

Shopping information

  • Accessories:
    • battery, exchangeable caps, stereo headset, charger, micro USB cable for charging, synchronisation and file transfer, and user documentation

To see the full specifications with in-depth details click here.

This device is also known as Sony Ericsson Kumquat, Sony Ericsson ST25i, Sony ST25a

Alternative variants

We list only the specs that are different than the main variant

Sony Xperia U ST25i

  • UMTS:
    • 900, 2100 MHz

Despite our efforts to provide full and correct Sony Xperia U specifications, there is always a possibility of making a mistake. If you see any wrong or incomplete data, please LET US KNOW.

If you are interested in using our specs commercially, check out our Phone specs database licensing page.

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