Phone Comparison - Samsung Galaxy Grand Duos I9082 vs Panasonic T31 vs Nokia Lumia 525
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| Manufacturer | Samsung | Panasonic | Nokia |
| Announced | December 2012 | October 2013 | November 2013 |
| Status | Available - January 2013 | Available - November 2013 | Available - January 2014 |
| Colors | Black, White | Bluish Black, Pure White | Yellow, orange, white, black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
143.5 x 76.9 x 9.6 mm (5.65 x 3.03 x 0.38 in) |
122 x 64.4 x 11.95 mm (4.8 x 2.54 x 0.47 in) |
119.9 x 64 x 9.9 mm (4.72 x 2.52 x 0.39 in) |
| Weight | 162 g (5.71 oz) | 120 g (4.23 oz) | 124 g (4.37 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 |
| 3G Network | HSDPA 850 / 1900 / 2100 - SIM 1 only HSDPA 900 / 1900 / 2100 - SIM 1 only |
HSDPA 850 / 1900 / 2100 | HSDPA 900 / 2100 HSDPA 850 / 1900 / 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
| Build Features | - | - | Super sensitive touch for finger nail and glove use, Changeable backcover |
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| OS | Android OS, v4.1.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) with FOTA upgrade | Microsoft Windows Phone 8 |
| Processor | Dual-core 1.2 GHz Cortex-A9, Broadcom | Dual-core 1.3 GHz, MTK 6572 | Dual-core 1 GHz, Qualcomm MSM8227 Snapdragon S4 |
| GPU | Broadcom VideoCore IV | Mali-400 | Adreno 305 |
| RAM | 1 GB | 512 MB | 1 GB |
| Internal Memory | 8 GB | 4 GB (1.9 GB user memory) | 8 GB ROM |
| External Memory | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | Capacitive touchscreen | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen, 2D Hardened Glass |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.0 inches | 4.0 inches | 4.0 inches |
| Resolution | 480 x 800 pixels (187 ppi) | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | 64.20% | 58.08% | 59.47% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM Radio with Recording | FM Radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 3.2 MP, 2048x1536 pixels | 5 MP, 2592х1944 pixels |
| Flash | LED flash | No | No |
| Features | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Image Stabilization | Fixed Focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection, Nokia Smart Camera, Cinemagraph lens, Panorama lens, Bing vision |
| Video | Yes, 1080p@30fps | Yes, VGA@30fps | Yes, 720p@30fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, VGA [Similar] | No [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, LE, EDR | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS, support and GLONASS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 4 GB (1.9 GB user memory), 512 MB RAM | 8 GB ROM, 1 GB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 64 GB |
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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-Ion Battery |
| Capacity | 2100 mAh | 1300 mAh | 1430 mAh |
| Stand by | Up to 440 h | Up to 510 h (2G) Up to 400 h (3G) |
Up to 336 h |
| Talk Time | Up to 10 h 10 min | Up to 3 h 30 min (2G) Up to 9 h 30 min (3G) |
Up to 16 h 54 min (2G) Up to 10 h 36 min (3G) |
