Phone Comparison - Acer Liquid vs LG Optimus 4X HD vs Lenovo S820
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| Manufacturer | Acer | LG | Lenovo |
| Announced | October 2009 | February 2012 | May 2013 |
| Status | Available - December 2009 | Available - June 2012 | Available - May 2013 |
| Colors | Black, White, Red | Black | Flamingo red |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115 x 62.5 x 12.5 mm (4.53 x 2.46 x 0.49 in) |
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) |
| Weight | 135 g (4.76 oz) | 133 g (4.69 oz) | 143 g (5.04 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 1900 / 2100 | HSDPA 900 / 1900 / 2100 | HSDPA 900 / 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v1.6 (Donut) | Android OS, v4.0 (Ice Cream Sandwich) | Android OS, v4.2 (Jelly Bean) |
| Processor | 768 MHz Scorpion, Qualcomm QSD8250 Snapdragon | Quad-core 1.5 GHz Cortex-A9, Nvidia Tegra 3 | Quad-core 1.2 GHz, MTK 6589W |
| GPU | Adreno 200 | ULP GeForce | PowerVR SGX544 |
| RAM | 256 MB | 1 GB | 1 GB |
| Internal Memory | N/A | 16 GB storage | 4 GB |
| External Memory | microSD, up to 32GB | Upto 16 GB | microSD, up to 32 GB |
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| Type | TFT capacitive touchscreen | HD-IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen |
| Colors | 256K colors | 16M colors | 16M colors |
| Size | 3.5 inches | 4.7 inches | 4.7 inches |
| Resolution | 480 x 800 pixels (267 ppi) | 720 x 1280 pixels (312 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | 48.35% | 67.74% | 62.82% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | Yes | FM radio; built-in antenna |
| Games | Yes | Yes | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2560х1920 pixels | 8 MP, 3264x2448 pixels | 12 MP, 4000 x 3000 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Face And Smile Detection, Touch Focus, Image Stabilization | Auto focus, Geo-tagging, Touch Focus, Face Detection |
| Video | Yes, VGA@20fps | Yes, 1080p@30fps | Yes |
| Front Camera | No [Similar] | Yes, 1.3 MP [Similar] | Yes, 2 MP [Similar] |
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| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes |
| Edge | Class 10, 236.8 kbps | Class 12 | Yes |
| 3G | HSDPA, 7.2 Mbps; HSUPA, 2.0 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, HSUPA |
| Bluetooth | Yes, v2.0 with A2DP | Yes, with A2DP | Yes, v3.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g | Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band |
| USB | Yes, miniUSB | Yes, microUSB (MHL) v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML5, Adobe Flash | HTML |
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| Internal | 256MB RAM, 512MB ROM | 16 GB storage, 1 GB RAM | 4 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32GB | Yes | microSD, up to 32 GB |
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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 | Standard battery, Li-Ion | Li-Po Battery |
| Capacity | 1350 mAh | 2150 mAh | 2000 mAh |
| Stand by | Up to 400 h | Up to 730 h (2G) Up to 686 h (3G) |
Up to 140 h (2G) Up to 140 h (3G) |
| Talk Time | Up to 5 h | Up to 9 h 20 min (2G) Up to 10 h 50 min (3G) |
Up to 22 h (2G) Up to 10 h (3G) |
