Phone Comparison - Panasonic P51 vs Lenovo S850 vs Panasonic P81
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| Manufacturer | Panasonic | Lenovo | Panasonic |
| Announced | May 2013 | February 2014 | June 2014 |
| Status | Available - May 2013 | Coming Soon - June 2014 | Available - June 2014 |
| Colors | Black, White | White, Pink | Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
144 x 75 x 8.5 mm (5.67 x 2.95 x 0.33 in) |
141 x 71 x 8.2 mm (5.55 x 2.8 x 0.32 in) |
7.9 mm thickness (0.31 in thickness) |
| Weight | 135 g (4.76 oz) | 140 g (4.94 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 / 1900 GSM 850 / 1800 / 1900 |
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 900 / 2100 HSDPA 850 / 1900 |
HSDPA 900 / 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Quad-core 1.2 GHz Cortex-A7, MTK MT6589 | Quad-core 1.3 GHz Cortex-A7, Mediatek MT6582 | Octa-core 1.7 GHz Cortex-A7, Mediatek MT6592 |
| GPU | PowerVR SGX544 | Mali-400MP2 | Mali-450MP4 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 4 GB storage | 16 GB ROM | 8 GB |
| External Memory | microSD, up to 32 GB | No | 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 | 5.0 inches | 5.0 inches | 5.5 inches |
| Resolution | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 63.69% | 68.71% | - |
| 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 | 13 MP, 4128 x 3096 pixels | 13 MP, 4160 x 3120 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 |
| Video | Yes, 1080p | Yes, 1080p@30fps | Yes, 1080p@30fps |
| Front Camera | Yes, 1.3 MP, 720p [Similar] | Yes, 5 MP, Wide Angle [Similar] | Yes, 2 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 11 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | Yes, v3.0 with A2DP, HS | Yes, v3.0 with A2DP |
| 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, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0, USB On-the-go | 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 | HTML5 | HTML5 | HTML5 |
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| Internal | 4 GB storage, 1 GB RAM | 16 GB ROM, 1 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | No | 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 | Non-removable Li-Po Battery | Non-removable Li-Ion Battery |
| Capacity | 2500 mAh | 2000 mAh | 2500 mAh |
| Stand by | - | Up to 336 h | - |
| Talk Time | - | Up to 13 h | - |
