Phone Comparison - Samsung Galaxy Ace Duos vs Panasonic P51 vs Lenovo S650 Vibe
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| Manufacturer | Samsung | Panasonic | Lenovo |
| Announced | May 2012 | May 2013 | December 2013 |
| Status | Available - June 2012 | Available - May 2013 | Available - December 2013 |
| Colors | Black | Black, White | Silver |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
112.7 x 61.5 x 11.5 mm (4.44 x 2.42 x 0.45 in) |
144 x 75 x 8.5 mm (5.67 x 2.95 x 0.33 in) |
138 x 69.8 x 8.8 mm (5.43 x 2.75 x 0.35 in) |
| Weight | 122 g (4.3 oz) | 135 g (4.76 oz) | 126 g (4.44 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 900 / 2100 | HSDPA 900 / 2100 |
| Messaging | SMS, MMS | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2 (Jelly Bean) |
| Processor | 832 MHz | Quad-core 1.2 GHz Cortex-A7, MTK MT6589 | Quad-core 1.3 GHz Cortex-A7, Mediatek MT6582 |
| GPU | PowerVR SGX544 | Mali-400MP2 | |
| RAM | N/A | 1 GB | 1 GB |
| Internal Memory | 3 GB storage, 512 MB | 4 GB storage | 8 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | TFT capacitive touchscreen | IPS LCD capacitive touchscreen | Capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 5.0 inches | 4.7 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 720 x 1280 pixels (294 ppi) | 540 x 960 pixels (234 ppi) |
| Screen-to-Body Ratio | 52.52% | 63.69% | 63.41% |
| 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, 2592x1944 pixels | 8 MP, 3264 x 2448 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR |
| Video | Yes | Yes, 1080p | Yes |
| Front Camera | No [Similar] | Yes, 1.3 MP, 720p [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 7.2 Mbps | HSDPA, 21 Mbps; HSUPA, 11 Mbps | HSDPA, HSUPA |
| Bluetooth | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP, EDR | 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 a/b/g/n, dual-band, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | 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 | HTML | HTML5 | HTML |
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| Internal | 3GB storage, 512 MB | 4 GB storage, 1 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 | - |
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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 | 1300 mAh | 2500 mAh | 2000 mAh |
| Stand by | Up to 520 h (2G) Up to 410 h (3G) |
- | - |
| Talk Time | Up to 6 h 30 min (2G) Up to 16 h 40 min (3G) |
- | Up to 12 h (2G) Up to 8 h (3G) |
