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Sony Xperia U (Sony Ericsson ST25i) Review & Specs

Sony Xperia U is a decent quality Android cellphone released back in 2012, coming with a medium sized 3.5-inches multi touch display, a quite powerful Dual-Core processor clocking at 1000 megahertz, and two cameras, a 5 MP back facing camera and a 0.3 mega-pixels front facing camera.

The Sony Xperia U is equipped with a powerful 1 gigahertz Dual-Core processing unit, included in a ST Ericsson NovaThor U8500 system chip with 512 MB RAM. Graphic intensive tasks usually uses lots of CPU cycles, so this cellphone counts with an additional 320 megahertz ARM Mali-400 MP1 GPU to help the CPU with those tasks. A nice point of this phone is its quite big 8 GB internal storage and although it doesn’t count with an SD extension slot, it should be enough to install a couple hundred games and applications, although it may not be enough if you are fan of the largest games currently available or taking tons of photos and videos.

This phone is offered in two different colors, black and white. This time, it seems like Sony forgot about optimizing the weight in this 3.88 ounces phone.

The Sony Xperia U is equipped with two cameras, a 5 MP back-facing camera and a 0.3 MP front-facing camera. It also captures videos in HD 1280×720. In addition, the camera includes a few interesting features like auto-focus, flash, geo tagging and face detection shooting.

This phone includes a interesting 3.5 inches display with a 854 x 480 resolution, which makes everything look great. Its display uses TFT capacitive technology, and can detect multiple fingers at the same time.

The Sony Xperia U includes WiFi connectivity (and it can provide it to other devices acting as a wireless router or modem) or fast 3G connection type, over HSDPA, HSUPA, UMTS and EDGE technologies. This cellphone uses a SIM card to connect to GSM networks.

The Sony Xperia U features a 1320 mAh mid capacity Li-Ion battery that can keep the Sony Xperia U running for several hours, although you may need to charge it after some heavy usage. Sony says this cellphone has a 6.6 hs talk time and a 260 hs stand by time.

This phone also includes some interesting features like Bluetooth (enables communication with other phones and accessories), GPS Localization and NFC (to trigger actions, transfer data or make payments by holding your phone close to another NFC device or tag), and multiple sensors like Light Sensor, Proximity Sensor, Accelerometer and Compass.

Sony sells this cellphone with charger, micro USB cable for charging, stereo headset, battery, and user documentation, exchangeable caps and synchronisation and file transfer.

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Device Type:Phone
Operating System (OS):Android 4.0, 2.3.7
Variant:See other variants reviews
Also Known As:Sony Ericsson Kumquat
Product code:ST25i
Dimensions:4.41 x 2.13 x 0.47 inches
Weight:3.88 ounces
Colors:Black and White
Scratch Resistant Glass:Yes
Accessories:And user documentation, battery, charger, exchangeable caps, micro USB cable for charging, stereo headset, synchronisation and file transfer
Release date:2012-02-26


Screen Type:TFT (16M colors)
Size:3.5 inches
Resolution:480 x 854 pixels
Pixel density:280 pixels per inch
Touch screen:Capacitive, Multi-touch


Chipset:ST Erricson NovaThor U8500
Processor:ARM Cortex-A9 (Dual-Core 1000 MHz)
RAM Memory:512 MB
Graphics Processor:ARM Mali-400 MP1 (320 MHz)
Internal Memory:8 GB
SD Card Slot:No SD card slot


Battery type:Li-Ion
Capacity:1320 mAh
Stand-by Time:260 hours
Talk Time:6.6 hours


Back camera:5 megapixels
Front camera:0.3 megapixels
Max video resolution:1280 x 720 (HD)
Camera features:Auto-Focus, Face Detection Shooting and Geo Tagging


    Mobile Hotspot:Yes
SIM Card Type:SIM
GSM Bands:850, 900, 1800, 1900
UMTS Bands:900, 2100

Other Features

Bluetooth:Version 2.1, EDR
Sensors:Accelerometer, Compass, Light Sensor and Proximity Sensor
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Andy Mathews

Lead Editor at Compare Before Buying. Product researcher and tech enthusiast passionate about consumer products, comparison charts and surfing.