Phone Comparison - Lenovo S820 vs Asus Zenfone 4 vs OnePlus One
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| Manufacturer | Lenovo | Asus | OnePlus |
| Announced | May 2013 | January 2014 | April 2014 |
| Status | Available - May 2013 | Available - June 2014 | Available - June 2014 |
| Colors | Flamingo red | Black, White, Red, Blue, Yellow | Silk White, Sandstone Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
139.5 x 69.7 x 9 mm (5.49 x 2.74 x 0.35 in) |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
152.9 x 75.9 x 8.9 mm (6.02 x 2.99 x 0.35 in) |
| Weight | 143 g (5.04 oz) | 115 g (4.06 oz) | 162 g (5.71 oz) |
| 2G Network | GSM 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700 / 1900 / 2100 |
| 4G Network | - | - | LTE 700 / 1700 / 2600 /2300/2100/1800 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2 (Jelly Bean) | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.4.2 (KitKat) |
| Processor | Quad-core 1.2 GHz, MTK 6589W | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801 |
| GPU | PowerVR SGX544 | PowerVR SGX544MP2 | Adreno 330 |
| RAM | 1 GB | 1 GB | 3 GB |
| Internal Memory | 4 GB | 8 GB | 16/64 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 64 GB | No |
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| Type | IPS LCD capacitive touchscreen | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.7 inches | 4.0 inches | 5.5 inches |
| Resolution | 720 x 1280 pixels (312 ppi) | 480 x 800 pixels (233 ppi) | 1080 x 1920 pixels (401 ppi) |
| Screen-to-Body Ratio | 62.82% | 59.74% | 71.69% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio; built-in antenna | FM Radio | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 12 MP, 4000 x 3000 pixels | 5 MP, 2592 x 1944 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED flash | No | dual-LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | Yes | Yes, 1080p@30fps | Yes, 2160p@30fps, 1080p@60fps, 720p@120fps, video stabilization, HDR |
| Front Camera | Yes, 2 MP [Similar] | Yes, VGA [Similar] | Yes, 5 MP, 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, HSUPA | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP, EDR | Yes, v4.1 with A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual band | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, DLNA, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0, USB On-the-go, USB Host |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS |
| Browser | HTML | HTML | HTML5 |
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| Internal | 4 GB, 1 GB RAM | 8 GB, 1 GB RAM | 16/64 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 64 GB | No |
| 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 | Li-Po Battery | Li-Po Battery | Non-removable Li-Po Battery |
| Capacity | 2000 mAh | 1200/1600 mAh | 3100 mAh |
| Stand by | Up to 140 h (2G) Up to 140 h (3G) |
Up to 192 h | - |
| Talk Time | Up to 22 h (2G) Up to 10 h (3G) |
Up to 10 h | - |
