Phone Comparison - Panasonic T31 vs Samsung Galaxy S Duos 2 S7582 vs Sony Xperia E1
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| Manufacturer | Panasonic | Samsung | Sony |
| Announced | October 2013 | November 2013 | January 2014 |
| Status | Available - November 2013 | Available - November 2013 | Available - March 2014 |
| Colors | Bluish Black, Pure White | White, Black | Black, Purple, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
122 x 64.4 x 11.95 mm (4.8 x 2.54 x 0.47 in) |
121.5 x 63.1 x 10.57 mm (4.78 x 2.48 x 0.42 in) |
118 x 62.4 x 12 mm (4.65 x 2.46 x 0.47 in) |
| Weight | 120 g (4.23 oz) | 118 g (4.16 oz) | 120 g (4.23 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 - all versions |
| 3G Network | HSDPA 850 / 1900 / 2100 | HSDPA 900 / 2100 | HSDPA 850 / 1900 / 2100 - D2004 HSDPA 900 / 2100 - D2005 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2.2 (Jelly Bean) with FOTA upgrade | Android OS, v4.2 (Jelly Bean) | Android OS, v4.3 (Jelly Bean) |
| Processor | Dual-core 1.3 GHz, MTK 6572 | Dual-core 1.2 GHz Cortex-A9, Broadcom BCM21664 | Dual-core 1.2 GHz, Qualcomm MSM8210 |
| GPU | Mali-400 | Broadcom VideoCore IV | Adreno 302 |
| RAM | 512 MB | 768 MB | 512 MB |
| Internal Memory | 4 GB (1.9 GB user memory) | 4 GB (1.9 GB user available) | 4 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 | TFT Capacitive Touchscreen, PLS | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 4.0 inches | 4.0 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | 58.08% | 59.52% | 61.98% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio with Recording | Stereo FM radio with RDS | FM radio with RDS |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 3.2 MP, 2048x1536 pixels | 5 MP, 2592х1944 pixels | 3 MP, 2048x1536 pixels |
| Flash | No | LED flash | No |
| Features | Fixed Focus, Geo-tagging | Auto focus, Geo-tagging | Geo-tagging, Face Detection, HDR, Image Stabilization, Panorama, Red-eye reduction, Touch capture |
| Video | Yes, VGA@30fps | Yes, 720p@30fps | Yes, SVGA@30FPS |
| Front Camera | Yes, VGA [Similar] | Yes, VGA [Similar] | No [Similar] |
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| GPRS | Yes | Yes | Up to 86 kbps |
| Edge | Yes | Yes | Up to 237 kbps |
| 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 | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot, Wi-Fi Direct | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 4 GB (1.9 GB user memory), 512 MB RAM | 4 GB (1.9 GB user available), 768 MB RAM | 4 GB, 512 MB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 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 | Li-Ion Battery | Standard battery, Li-Ion | Li-Ion Battery |
| Capacity | 1300 mAh | 1500 mAh | 1750 mAh |
| Stand by | Up to 510 h (2G) Up to 400 h (3G) |
Up to 280 h (3G) | Up to 551 h |
| Talk Time | Up to 3 h 30 min (2G) Up to 9 h 30 min (3G) |
Up to 8 h (3G) | Up to 9 h 12 min |
