Phone Comparison - Panasonic P51 vs Acer Liquid E700 vs Sony Xperia E4 Dual
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| Manufacturer | Panasonic | Acer | Sony |
| Announced | May 2013 | May 2014 | February 2015 |
| Status | Available - May 2013 | Coming Soon - Q3 2014 | Available - March 2015 |
| Price | - | - | Rs. 11,490 ($168.97) [Similarly Priced] |
| Colors | Black, White | Titanium Black, Metallic Red | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
144 x 75 x 8.5 mm (5.67 x 2.95 x 0.33 in) |
9.9 mm thick (0.39 in thick) |
137 x 74.6 x 10.5 mm (5.39 x 2.94 x 0.41 in) |
| Weight | 135 g (4.76 oz) | 155 g (5.47 oz) | 144 g (5.08 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 & SIM 3 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 2100 | HSDPA 850 / 1900 / 2100 - E2114, E2124 HSDPA 900 / 2100 - E2115 |
| Messaging | SMS, MMS, Push Mail, 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, v4.4.2 (KitKat) | Android OS, v4.4.4 (KitKat) |
| Processor | Quad-core 1.2 GHz Cortex-A7, MTK MT6589 | Quad-core 1.3 GHz, Mediatek MT6582 | Quad-core 1.3 GHz Cortex-A7, Mediatek MT6582 |
| GPU | PowerVR SGX544 | Mali-400MP2 | Mali-400MP2 |
| RAM | 1 GB | 2 GB | 1 GB |
| Internal Memory | 4 GB storage | 16 GB | 8 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen | IPS Capacitive Touchscreen, Scratch-resistant Glass |
| Colors | 16M colors | 16.7M colors | 16M colors |
| Size | 5.0 inches | 5 inches | 5.0 inches |
| Resolution | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (294 ppi) | 540 x 960 pixels (220 ppi) |
| Screen-to-Body Ratio | 63.69% | - | 67.61% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio with Recording | FM radio with RDS |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264 x 2448 pixels | 8 MP, 3264x2448 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | Yes, 1080p | Yes, 1080p | 1080p@30fps |
| Front Camera | Yes, 1.3 MP, 720p [Similar] | Yes, 2 MP, 720p [Similar] | 2 MP, 720p [Similar] |
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| GPRS | Yes | Yes | Up to 107 kbps |
| Edge | Yes | Yes | Up to 296 kbps |
| 3G | HSDPA, 21 Mbps; HSUPA, 11 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSPA 21.1/5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP | v4.1, A2DP, apt-X |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| USB | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0, USB On-the-go | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS |
| Browser | HTML5 | HTML5 | HTML |
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| Internal | 4 GB storage, 1 GB RAM | 16 GB, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
| USB OTG | Supported | 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-Ion Battery | Li-Po battery | Non-removable Li-Ion Battery |
| Capacity | 2500 mAh | 3500 mAh | 2300 mAh |
| Stand by | - | - | Up to 552 h (2G) Up to 548 h (3G) |
| Talk Time | - | Up to 24 h | Up to 12 h (2G) Up to 12 h 40 min (3G) |
