| Local Name | Xperia U |
| Additional Information | Previously known as Sony Ericsson ST25i Kumquat |
| Technology | GSM / HSPA |
| 3G Bands | HSDPA 900 / 2100 - ST25i | HSDPA 850 / 1900 / 2100 - ST25a |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | HSPA 14.4/5.76 Mbps |
| GPRS | Up to 107 kbps |
| EDGE | Up to 296 kbps |
| Announced | 2012, February |
| Status | Available. Released 2012, May |
| 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 capacitive touchscreen, 16M colors |
| Screen Size | 3.5 inches (~55.8% screen-to-body ratio) |
| Resolution | 480 x 854 pixels (~280 ppi pixel density) |
| Mulitouch | Yes, up to 4 fingers |
| Protection | Scratch-resistant glass | Sony Mobile BRAVIA Engine - Timescape UI |
| OS | Android OS, v2.3 (Gingerbread), upgradable to v4.0 (Ice Cream Sandwich) |
| Chipset | NovaThor U8500 |
| CPU | Dual-core 1 GHz Cortex-A9 |
| GPU | Mali-400 |
| Card Slot | No |
| Internal Memory | 8 GB (4 GB user available), 512 MB RAM |
| Primary Camera | 5 MP, 2592 x 1944 pixels, autofocus, LED flash |
| Camera Features | Geo-tagging, touch focus, face/smile detection, panorama |
| Video | 720p@30fps |
| Secondary Camera | VGA |
| Alert Types | Vibration; MP3, WAV ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| Sound | Sony 3D surround sound audio technology |
| WLAN | Wi-Fi 802.11 b/g/n, hotspot, DLNA |
| Bluetooth | v2.1, A2DP, EDR |
| GPS | Yes, with A-GPS |
| Radio | Stereo FM radio with RDS |
| USB | microUSB v2.0, USB Host |
| Sensors | Accelerometer, proximity, compass |
| Messaging | SMS (threaded view), MMS, Email, IM, Push Email |
| Browser | HTML5, Adobe Flash |
| Java | Yes, via Java MIDP emulator |
| Features Summary | Active noise cancellation with dedicated mic, MP4/H.264/WMV player, MP3/eAAC+/WMA/WAV player, Organizer, Document viewer, Voice memo/dial/commands, Predictive text input |
| Battery | 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 |
| Colors | Black, White/ exchangeable bottom caps in white, black, pink, yellow |
| SAR EU | 1.62 W/kg (head) |
