Phone Comparison - Panasonic P51 vs Micromax Canvas Knight A350 vs Lenovo S939
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| Manufacturer | Panasonic | Micromax | Lenovo |
| Announced | May 2013 | January 2014 | February 2014 |
| Status | Available - May 2013 | Available - March 2014 | Available - February 2014 |
| Colors | Black, White | Black, White with Gold, Black with Gold | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
144 x 75 x 8.5 mm (5.67 x 2.95 x 0.33 in) |
- |
170 x 86.5 x 8.65 mm (6.69 x 3.41 x 0.34 in) |
| Weight | 135 g (4.76 oz) | - | 180 g (6.35 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 2100 | HSDPA 2100 |
| 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, v4.2.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Quad-core 1.2 GHz Cortex-A7, MTK MT6589 | Octa-core 2.0 GHz, Mediatek MT6592 | Octa-core 1.7 GHz, Mediatek MT6592 |
| GPU | PowerVR SGX544 | Mali-450MP4 | Mali-450MP4 |
| RAM | 1 GB | 2 GB | 1 GB |
| Internal Memory | 4 GB storage | 32 GB (25 GB for mass storage and 1.5 GB for applications) | 8 GB ROM |
| 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, OGS | IPS LCD Capacitive Touchscreen, OGS |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.0 inches | 5.0 inches | 6.0 inches |
| Resolution | 720 x 1280 pixels (294 ppi) | 1080 x 1920 pixels (441 ppi) | 720 x 1280 pixels (245 ppi) |
| Screen-to-Body Ratio | 63.69% | - | 67.36% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio with Recording | FM Radio with Recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264 x 2448 pixels | 16 MP, 4640 x 3480 pixels | 8 MP, 3264x2448 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, 360 degree Panorama, HDR, Image Stabilization | Auto focus, Geo-tagging, Touch Focus, Face Detection, 360 degree Panorama, HDR, Image Stabilization |
| Video | Yes, 1080p | Yes, 1080p@30fps | Yes, 1080p@30fps |
| Front Camera | Yes, 1.3 MP, 720p [Similar] | Yes, 8 MP, 1080p [Similar] | Yes, 1.6 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 11 Mbps | HSDPA, 42.2 Mbps, HSUPA, 11.5 Mbps | HSDPA, 42.2 Mbps, HSUPA, 11.5 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | Yes, v4.0 | Yes, v4.0 |
| 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 hotspot |
| USB | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0 | 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 | 32 GB (25 GB for mass storage and 1.5 GB for applications), 2 GB | 8 GB ROM, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | No | 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 | Li-Ion Battery | Li-Ion Battery | Li-Ion Battery |
| Capacity | 2500 mAh | 2350 mAh | 3000 mAh |
| Stand by | - | Up to 175 h | - |
| Talk Time | - | Up to 7 h 30 min | - |
