Phone Comparison - LG Optimus 4X HD vs Lenovo S820 vs Acer Liquid E600
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| Manufacturer | LG | Lenovo | Acer |
| Announced | February 2012 | May 2013 | May 2014 |
| Status | Available - June 2012 | Available - May 2013 | Coming Soon - Q3 2014 |
| Colors | Black | Flamingo red | Titanium Black, Metallic Red |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
132.4 x 68.1 x 8.9mm (5.21 x 2.68 x 0.35in) |
139.5 x 69.7 x 9 mm (5.49 x 2.74 x 0.35 in) |
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| Weight | 133 g (4.69 oz) | 143 g (5.04 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 & SIM 3 |
| 3G Network | HSDPA 900 / 1900 / 2100 | HSDPA 900 / 2100 | HSDPA 2100 |
| 4G Network | - | - | LTE |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.0 (Ice Cream Sandwich) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.4.2 (KitKat) |
| Processor | Quad-core 1.5 GHz Cortex-A9, Nvidia Tegra 3 | Quad-core 1.2 GHz, MTK 6589W | Quad-core 1.2 GHz, Qualcomm MSM8926 Snapdragon 400 |
| GPU | ULP GeForce | PowerVR SGX544 | Adreno 305 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 16 GB storage | 4 GB | 4 GB ROM |
| External Memory | Upto 16 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | HD-IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16.7M colors |
| Size | 4.7 inches | 4.7 inches | 5 inches |
| Resolution | 720 x 1280 pixels (312 ppi) | 720 x 1280 pixels (312 ppi) | 480 x 854 pixels (196 ppi) |
| Screen-to-Body Ratio | 67.74% | 62.82% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Yes | FM radio; built-in antenna | FM Radio with Recording |
| Games | Yes | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 12 MP, 4000 x 3000 pixels | 8 MP, 3264x2448 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Face And Smile Detection, Touch Focus, Image Stabilization | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR |
| Video | Yes, 1080p@30fps | Yes | Yes, 1080p |
| Front Camera | Yes, 1.3 MP [Similar] | Yes, 2 MP [Similar] | Yes, VGA [Similar] |
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| GPRS | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes | Yes |
| Edge | Class 12 | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, HSUPA | HSDPA, 42 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, with A2DP | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, microUSB (MHL) v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML5, Adobe Flash | HTML | HTML5 |
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| Internal | 16 GB storage, 1 GB RAM | 4 GB, 1 GB RAM | 4 GB ROM, 1 GB RAM |
| Expandable Storage | Yes | microSD, up to 32 GB | microSD, up to 32 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 | Li-Ion Battery |
| Capacity | 2150 mAh | 2000 mAh | 2500 mAh |
| Stand by | Up to 730 h (2G) Up to 686 h (3G) |
Up to 140 h (2G) Up to 140 h (3G) |
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| Talk Time | Up to 9 h 20 min (2G) Up to 10 h 50 min (3G) |
Up to 22 h (2G) Up to 10 h (3G) |
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