Phone Comparison - Sony Xperia U vs Asus Zenfone 4 vs Asus Zenfone 5
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| Manufacturer | Sony | Asus | Asus |
| Announced | February 2012 | January 2014 | January 2014 |
| Status | Available - May 2012 | Available - June 2014 | Available - June 2014 |
| Colors | Black, White/ exchangeable bottom caps in white, black, pink, ye | Black, White, Red, Blue, Yellow | Black, White, Red, Blue, Gold |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
112 x 54 x 12 mm (4.41 x 2.13 x 0.47 in) |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
148.2 x 72.8 x 5.5-10.3 (5.83 x 2.87 x 0.22-0.41) |
| Weight | 110 g (3.88 oz) | 115 g (4.06 oz) | 140 g (4.94 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 - ST25iHSDPA 850 / 1900 / 2100 - ST25a | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread), upgradable to v4.0 | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) |
| Processor | Dual-core 1 GHz Cortex-A9, STE U8500 | Dual-core 1.2 GHz, Intel Atom Z2520 | Dual-core 2.0 GHz / Dual-core 1.6 GHz, Intel Atom Z2580/Z2560 |
| GPU | Mali-400MP | PowerVR SGX544MP2 | PowerVR SGX544MP2 |
| RAM | 512 MB | 1 GB | 1/2 GB |
| Internal Memory | 8 GB (4 GB user-accessible) | 8 GB | 8/16 GB |
| External Memory | No | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | LED-backlit LCD, capacitive touchscreen | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 4.0 inches | 5.0 inches |
| Resolution | 480 x 854 pixels (280 ppi) | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 55.77% | 59.74% | 63.76% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM Radio | FM Radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 5 MP, 2592 x 1944 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED flash | No | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, 3D Sweep Panorama, Image Stabilization | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection |
| Video | Yes, 720p@30fps, video light | Yes, 1080p@30fps | Yes |
| Front Camera | Yes, VGA [Similar] | Yes, VGA [Similar] | Yes, 2 MP [Similar] |
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| GPRS | Up to 107 kbps | Yes | Yes |
| Edge | Up to 296 kbps | Yes | Yes |
| 3G | HSDPA 14.4 Mbps, HSUPA 5.76 Mbps | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v2.1 with A2DP, EDR | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot, DLNA | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0, USB On-the-go support | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML5, Adobe Flash | HTML | HTML |
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| Internal | 8 GB (4 GB user-accessible), 512 MB RAM | 8 GB, 1 GB RAM | 8/16 GB, 1/2 GB RAM |
| Expandable Storage | No | microSD, up to 64 GB | microSD, up to 64 GB |
| USB OTG | Supported | - | - |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| NFC | |
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| Type | Standard battery, Li-Ion | Li-Po Battery | Non-removable Li-Po Battery |
| Capacity | 1320 mAh | 1200/1600 mAh | 2110 mAh |
| Stand by | Up to 260 h (2G) Up to 472 h (3G) |
Up to 192 h | Up to 353 h (3G) |
| Talk Time | Up to 6 h 36 min (2G) Up to 5 h 36 min (3G) |
Up to 10 h | Up to 18 h 30 min (3G) |
