Phone Comparison - LG Optimus Black P970 vs Acer Liquid E2 Duo vs Lenovo P780
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| Manufacturer | LG | Acer | Lenovo |
| Announced | January 2011 | April 2013 | June 2013 |
| Status | Available - May 2011 | Coming Soon - May 2013 | Available - June 2013 |
| Colors | Black, Pink, Silver, White, Brown | Black, White | Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
122 x 64 x 9.2 mm
(4.8 x 2.52 x 0.36 in ) |
131 x 68 x 9.9 mm (5.16 x 2.68 x 0.39 in) |
143 x 73 x 10 mm (5.63 x 2.87 x 0.39 in) |
| Weight | 109 g (3.84 oz) | 140 g (4.94 oz) | 176 g (6.21 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 1700 / 2100 HSDPA 900 / 1900 / 2100 |
HSDPA | HSDPA 900 / 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.2 (Froyo), upgradable to v2.3 | Android OS, v4.2.1 (Jelly Bean) | Android OS, v4.2 (Jelly Bean) |
| Processor | 1 GHz Cortex-A8, TI OMAP 3630 | Quad-core 1.2 GHz Cortex-A7, MTK 6589 | Quad-core 1.2 GHz Cortex-A7, MTK 6589 |
| GPU | PowerVR SGX530 | PowerVR SGX 544MP | PowerVR SGX544 |
| RAM | 512 MB | 1 GB | 1 GB |
| Internal Memory | 2 GB storage (1 GB user-available) | 4 GB | 4 GB |
| External Memory | microSD, up to 32GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 4.5 inches | 5.0 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 540 x 960 pixels (245 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 58.44% | 62.55% | 65.90% |
| 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 | 8 MP, 3264 x 2448 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Face And Smile Detection | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection |
| Video | Yes, 720p@30fps | Yes, 1080p@30fps | Yes |
| Front Camera | Yes, 2 MP [Similar] | Yes, 2 MP [Similar] | Yes, 1.2 MP [Similar] |
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| GPRS | Up to 48 kbps | Yes | Yes |
| Edge | Up to 237 kbps | Yes | Yes |
| 3G | HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps | HSPA+ | HSDPA, HSUPA |
| Bluetooth | Yes, v2.1 with A2DP, EDR | Yes, v3.0 with A2DP, EDR | Yes, v3.0 |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi hotspot |
| USB | Yes, microUSB 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 | HTML, Adobe flash | HTML | HTML |
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| Internal | 2 GB storage (1 GB user-available), 512 MB RAM | 4 GB, 1 GB RAM | 4 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32GB | 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-Ion Battery | Li-Po Battery |
| Capacity | 1500 mAh | 2000 mAh | 4000 mAh |
| Stand by | Up to 375 h | Up to 450 h | Up to 840 h |
| Talk Time | Up to 6 h | Up to 9 h | Up to 43 h (2G) Up to 25 h (3G) |
