Sony Xperia U

Specifications
Sony Xperia U
MORE PICTURES
  • 3.5" 480x854 pixels
  • 5MP 720p
  • 512MB RAM NovaThor U8500
  • 1320mAh Li-Ion
Released 2012, May 110g, 12mm thickness Android 2.3, up to 4.0 8GB storage, no card slot
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Previously known as Sony Ericsson ST25i Kumquat

Network
Technology GSM / HSPA
2G bands GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 900 / 2100 - ST25i
  HSDPA 850 / 1900 / 2100 - ST25a
Speed HSPA 14.4/5.76 Mbps
Launch
Announced 2012, February. Released 2012, May
Status Discontinued
Body
Dimensions 112 x 54 x 12 mm (4.41 x 2.13 x 0.47 in)
Weight 110 g (3.88 oz)
SIM Mini-SIM
Display
Type TFT
Size 3.5 inches, 33.8 cm2 (~55.8% screen-to-body ratio)
Resolution 480 x 854 pixels, 16:9 ratio (~280 ppi density)
Protection Scratch-resistant glass
Platform
OS Android 2.3 (Gingerbread), upgradable to 4.0 (Ice Cream Sandwich)
Chipset NovaThor U8500
CPU Dual-core 1.0 GHz Cortex-A9
GPU Mali-400
Memory
Card slot No
Internal 8GB (4GB user available), 512MB RAM
Main Camera
Single 5 MP, AF
Features LED flash, panorama
Video 720p@30fps
Selfie Camera
Single VGA
Video
Sound
Loudspeaker Yes
3.5mm jack Yes
Comms
WLAN Wi-Fi 802.11 b/g/n, hotspot, DLNA
Bluetooth 2.1, A2DP, EDR
GPS Yes, with A-GPS
Radio Stereo FM radio, RDS
USB microUSB 2.0, USB On-The-Go
Features
Sensors Accelerometer, proximity, compass
Battery
Type Removable Li-Ion 1320 mAh battery
Stand-by Up to 260 h (2G) / Up to 472 h (3G)
Talk time Up to 6 h 36 min (2G) / Up to 5 h 36 min (3G)
Music play Up to 45 h
Misc
Colors Black, White/ exchangeable bottom caps in white, black, pink, yellow
SAR 1.09 W/kg (head)     0.93 W/kg (body)    
SAR EU 1.62 W/kg (head)    
Price About 140 EUR
Tests
Display Contrast ratio: 930:1 (nominal) / 1.758:1 (sunlight)
Camera Photo / Video
Loudspeaker Voice 65dB / Noise 65dB / Ring 72dB
Audio quality Noise -87.3dB / Crosstalk -87.7dB

User opinions and reviews

I can't remember how I did root, but there are no apps for free sms-call which can run on XperiaU, it has very low RAM and if you install anything like that it's pretty much unusable. Also don't bother with custom roms. I'm using ...

  • Daisy

@rokiroki Can you tell me how to root this phone to work in 2020? I cannot install any app for chat and free calls...

Mine still works, just had to root and uninstall google services. Small, reliable, battery lasts great, led strap indicates calls and messages. I want phone like this one, just with more RAM and more storage, nothing else.

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