Phone Comparison - Lenovo S820 vs Lenovo P780 vs Asus Zenfone 4
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| Manufacturer | Lenovo | Lenovo | Asus |
| Announced | May 2013 | June 2013 | January 2014 |
| Status | Available - May 2013 | Available - June 2013 | Available - June 2014 |
| Colors | Flamingo red | Black | Black, White, Red, Blue, Yellow |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
139.5 x 69.7 x 9 mm (5.49 x 2.74 x 0.35 in) |
143 x 73 x 10 mm (5.63 x 2.87 x 0.39 in) |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
| Weight | 143 g (5.04 oz) | 176 g (6.21 oz) | 115 g (4.06 oz) |
| 2G Network | GSM 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) |
| Processor | Quad-core 1.2 GHz, MTK 6589W | Quad-core 1.2 GHz Cortex-A7, MTK 6589 | Dual-core 1.2 GHz, Intel Atom Z2520 |
| GPU | PowerVR SGX544 | PowerVR SGX544 | PowerVR SGX544MP2 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 4 GB | 4 GB | 8 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.7 inches | 5.0 inches | 4.0 inches |
| Resolution | 720 x 1280 pixels (312 ppi) | 720 x 1280 pixels (294 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | 62.82% | 65.90% | 59.74% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio; built-in antenna | FM radio | FM Radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 12 MP, 4000 x 3000 pixels | 8 MP, 3264 x 2448 pixels | 5 MP, 2592 x 1944 pixels |
| Flash | LED flash | LED flash | No |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Panorama |
| Video | Yes | Yes | Yes, 1080p@30fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, 1.2 MP [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, HSUPA | HSDPA, HSUPA | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v3.0 with A2DP | Yes, v3.0 | Yes, v4.0 with A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual band | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML | HTML |
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| Internal | 4 GB, 1 GB RAM | 4 GB, 1 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 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 | Li-Po Battery | Li-Po Battery | Li-Po Battery |
| Capacity | 2000 mAh | 4000 mAh | 1200/1600 mAh |
| Stand by | Up to 140 h (2G) Up to 140 h (3G) |
Up to 840 h | Up to 192 h |
| Talk Time | Up to 22 h (2G) Up to 10 h (3G) |
Up to 43 h (2G) Up to 25 h (3G) |
Up to 10 h |
