| Model and physical features | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Model | Xperia U ST25i | Smart Prime 6 |
| Also known as | Sony Xperia U ST25, Sony ST25i, Sony Kumquat | Alcatel Smart Prime 6 LTE, Vodafone Smart 6 Prime VF-895N |
| Country or region available |  | feature not registered |
| Brand | Sony | Vodafone |
| Release date | August, 2012 | May, 2015 |
| Depth | 12 millimeters (0.47 inches) | 9 millimeters (0.35 inches) |
| Size (width x height) | 54 x 112 millimeters (2.13 x 4.41 in) | 71.9 x 141.7 millimeters (2.83 x 5.58 in) |
| Weight | 110 grams (3.85 ounces) | 155 grams (5.43 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | feature not registered | feature not registered |
| Protection against water and others | Not supported | Not supported |
| Operating system (OS) | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Operating system | Android 2.3.7 Gingerbread | Android 5.0.2 Lollipop |
| Firmware update | Android 4.0.4 Ice Cream Sandwich ICS | feature not registered |
| Hardware | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Architecture - Chipset | 32bit - ST-Ericsson NovaThor U8500 | 64bit - Qualcomm Snapdragon 410 MSM8916 (28nm) |
| CPU processor | 1Ghz Dual-Core ARM Cortex-A9 | 1.2Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | ARM Mali-400 | Qualcomm Adreno 306 450Mhz |
| RAM memory | 512MB LPDDR2 | 1GB LPDDR2 |
| Internal storage | 8GB (4GB user available) | 8GB (5GB user available)
eMMC 4.5 |
| External storage | Not supported | Until 64GB microSD, microSDHC, microSDXC
(dedicated slot) |
| Display | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Display type | TFT LCD LED-Backlit | TFT LCD IPS |
| Screen size | 3.5" inches | 5" inches |
| Screen-to-body ratio | ~55.8% (screen-to-body ratio) | ~67.6% (screen-to-body ratio) |
| Touchscreen | Capacitive Multitouch 4-points | Capacitive Multitouch |
| Display resolution | 480x854 pixels | 720x1280 pixels |
| Pixel density (dot pitch) | 280 PPI | 294 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Scratch-resistant glass | Not supported |
| Mobile networks and data | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot
Standard mini-SIM (2FF) | 1 slot
micro-SIM (3FF) |
| GSM Mhz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 900/2100 | UMTS 900/2100 |
| Primary 4G/5G network | Not supported | LTE Cat4 800/1800/2600 (Bands 3,7,20) |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
| Maximum download/upload | 14.4/5.76 Mbps | 150/50 Mbps |
| Messaging and calling | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder |
| Primary / back camera | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Main camera | 5 megapixels | 8 megapixels |
| Main camera resolution | 2592x1944 pixels | 3264x2448 pixels |
| Video recording (primary) | HD (1280x720 pixels) 30 fps | Full HD (1920x1080 pixels) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | feature not registered | feature not registered |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection |
| BSI sensor | Not supported | Not supported |
| HDR | Not supported | HDR photo only main camera |
| Front / secondary camera | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Front camera | 0.3 megapixels | 2 megapixels |
| Front camera resolution | 640x480 pixels | 1600x1200 pixels |
| Video recording (secondary) | VGA (640x480 pixels) | VGA (640x480 pixels) |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Multimedia | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Radio | FM with RDS | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.263, H.264, WMV | MP4, H.264, H.263 |
| Audio formats | MP3, eAAC+, WMA, WAV | MP3, WAV, eAAC+ |
| Connectivity and interfaces | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| USB | MicroUSB 2.0 | MicroUSB 2.0 |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 2.1 version A2DP | 4.0 version A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 b/g/n (2.4Ghz) |
| DLNA | Supported | Not supported |
| NFC | Not supported | Supported |
| GPS | A-GPS, GeoTagging | A-GPS, GeoTagging |
| Infrared port | Not supported | Not supported |
| Other functions | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Active noise cancellation | Supported | Not supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML | HTML, XHTML, HTML5 |
| Java / Flash player | Supported | Not supported |
| Sensors | Accelerometer
Proximity
Compass
Ambient Light
| Accelerometer
Proximity
Ambient Light
|
| Other features | - Colors: Black, White
- Exchangeable bottom caps: White, Black, Pink, Yellow
- USB On-The-Go 1.3
- Sony Reality Display
- Sony Mobile BRAVIA Engine
- xLoud
- 3D surround sound
- WiFi hotspot | - Colors: Gray
- WiFi hotspot |
| Power supply and autonomy | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| Battery | Li-Ion (Removable) | LiPo - Li-Ion polymer (Removable) |
| Battery capacity | 1320 mAh | 2500 mAh |
| Battery model / charger (watts) | BA600 | feature not registered |
| Talk time | 336 minutes | 5.6 hours | 0.2 day | 480 minutes | 8 hours | 0.3 day |
| Standby | 28320 minutes | 472 hours | 19.7 days | 28800 minutes | 480 hours | 20 days |
| Radiation rate (SAR) | Sony Xperia U ST25i | Vodafone Smart Prime 6 |
| SAR USA, Mexico, Colombia | 1.09 W/Kg (head) | 0.93 W/Kg (body) | feature not registered |
| SAR European Union, UK | 1.62 W/Kg (head) | 0.868 W/Kg (body) |