| Name | SONY Xperia U
 | Karbonn A21
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| Processor: | Cortex-A9, Dual core 1GHz | 1.2 GHz Qualcomm Scorpion Dual Core |
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| GPU: | Mali 400mp | No GPU |
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| Operating System: | Android | Android |
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| Operating System Version: | v2.3, Gingerbread, planned upgrade to v4.0 ICS | Ice Cream Sandwich (4.0) |
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| Sensors: | Proximity, Accelerometer, Gyro | Light Sensor, 3D G-Sensor and Proximity Sensor |
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| Manufacturer: | SONY | Karbonn |
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| Series Name: | Xperia | Karbonn A |
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| Weight: | 110g | 130g |
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| Dimensions: | 112x54x12 | N/A |
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| Camera Type: | Dual Camera | Dual Camera |
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| Front Camera: | VGA | 1.3 Mega Pixels |
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| Back Camera: | 5 megapixels | 5 Mega Pixels |
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| Camera features: | NA | 2592 x 1944 pixels resolution, HD images, LED Flash, Auto Focus, Face Detection, Digital Zooming etc. |
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| Video Camera features: | NA | Camera can capture videos in MP4, H.263, H.264, AVI and 3GP formats. |
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| External Memory: | No | Up to 32 GB |
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| RAM: | 512 Mb | 1GB |
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| Internal Storage: | 4GB only | 4 GB Storage |
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| Screen Size: | 3.2 inches | 480 x 800 px |
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| Display: | 480x854 resolution, Sony Mobile Bravia Engine | 4.5 inches TFT Capacitive Touchscreen |
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| Ports: | microUSB, v2.0 | USB 2.0 |
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| Battery Type: | standard, 1320 mAh | 1800 mAh |
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| Battery (Talk Time): | NA | 5 hours (2G) and 8 hours (3G) |
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| Battery (Standby Time): | NA | 200 hours (2G) and 290 hours (3G) |
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| Audio: | Sony 3-D surround sound technology | MIDI, WAV and MP3 |
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| Video: | Sony Mobile Bravia Engine | MP4, AVI, 3GP, H.263 and H.264 |
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| Accessories: | Headphones, Charger, USB cable | |
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| Connectivity: | Bluetooth, Wi-Fi | 3G - HSDPA, 7.2 Mbps, Wi-Fi - 802.11 b/g/n, EDGE and A-GPS with Google Maps |
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| Network: | GPRS, EDGE, 3G( HSDPA and HSUPA) | 2G - GSM 850 / 900 / 1800 / 1900, 3G - HSDPA 850 / 1900 / 2100 |
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| GPRS: | Yes | Yes |
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| Bluetooth: | Yes,v2.1 | v2.1 |
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| Announced/Launched Date: | NA | September 2012 |
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| Available Colors: | Black, White, Pink, Yellow | Pearl White |
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| Built-in Apps: | Android and related apps | Gmail, Twitter, Google Search, Google Play, Skype, Google Talk, Yahoo Messenger, Flickr, Picasa, Facebook, PayTM, NexGTv, WhatsApp, Mobile TV and Google Currents |
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| SIM Card Type: | Regular SIM | Regular SIM |
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| SIM Slots: | Single SIM | Dual SIM |
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| Price Range: | US$251 to US$499 | US$100 to US$199 |
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| Category: | Mid range Smartphone | Mid range Smartphone |
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| Read SONY Xperia U reviews. | Read Karbonn A21 reviews. |
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| Compare SONY Xperia U:
HTC 8XSamsung Galaxy S DUOSSamsung Galaxy Note IINokia Lumia 920Samsung Galaxy Victory Lenovo S880LG Optimus L5 E612LG Optimus L7 P705Sony Xperia PSony Ericsson Xperia ARC S LT18iNokia Lumia 810LG Optimus L9 P765LG E730Apple's iPhone 4SLava XOLO A700Karbonn A11Karbonn A21Micromax A116 Canvas HDIntex Aqua StyleSamsung Galaxy S II plusSamsung Galaxy Grand Duos GT-i9082EWASony Xperia tipo dualSamsung Galaxy Fame S6810BLU Quattro 4.5 HDLava XOLO A1000 | Compare Karbonn A21:
HTC 8XSamsung Galaxy S DUOSSamsung Galaxy Note IINokia Lumia 920Samsung Galaxy Victory Lenovo S880LG Optimus L5 E612LG Optimus L7 P705SONY Xperia USony Xperia PSony Ericsson Xperia ARC S LT18iNokia Lumia 810LG Optimus L9 P765LG E730Apple's iPhone 4SLava XOLO A700Karbonn A11Micromax A116 Canvas HDIntex Aqua StyleSamsung Galaxy S II plusSamsung Galaxy Grand Duos GT-i9082EWASony Xperia tipo dualSamsung Galaxy Fame S6810BLU Quattro 4.5 HDLava XOLO A1000 |