Phone Comparison - Karbonn A25 vs Samsung Galaxy S Duos 2 S7582 vs Micromax Unite A092
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| Manufacturer | Karbonn | Samsung | Micromax |
| Announced | May 2013 | November 2013 | June 2014 |
| Status | Available - May 2013 | Available - November 2013 | Available - June 2014 |
| Colors | White, Black | White, Black | PristineWhite, ClassyBlack, Mystic Grey, Vibrant Yellow, Fiery R |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
121.5 x 63.1 x 10.57 mm (4.78 x 2.48 x 0.42 in) |
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| Weight | - | 118 g (4.16 oz) | - |
| 2G Network | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | No | HSDPA 900 / 2100 | HSDPA 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.0 (Ice Cream Sandwich) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.3 (Jelly Bean) |
| Processor | Dual-core 1 GHz | Dual-core 1.2 GHz Cortex-A9, Broadcom BCM21664 | Quad-core 1.2 GHz, Qualcomm MSM8212 Snapdragon 200 |
| GPU | - | Broadcom VideoCore IV | Adreno 302 |
| RAM | 512 MB | 768 MB | 1 GB |
| Internal Memory | 512 MB ROM | 4 GB (1.9 GB user available) | 8 GB (2.99 GB for mass storage) |
| 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 | IPS LCD Capacitive Touchscreen |
| 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 | - | 59.52% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | Stereo FM radio with RDS | FM Radio with Recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592х1944 pixels | 5 MP, 2592х1944 pixels | 5 MP, 2592х1944 pixels |
| Flash | LED flash | LED flash | LED Flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging | Fixed focus, Geo-tagging, Panorama |
| Video | Yes | Yes, 720p@30fps | Yes, 480p |
| Front Camera | Yes, VGA [Similar] | Yes, VGA [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes, Class 12 | Yes | Yes |
| 3G | No | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 11 Mbps |
| Bluetooth | Yes, v3.0 | Yes, v4.0 with A2DP | 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 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, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 512 MB ROM, 512 MB RAM | 4 GB (1.9 GB user available), 768 MB RAM | 8 GB (2.99 GB for mass storage), 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 | Li-Ion Battery | Standard battery, Li-Ion | Li-Ion Battery |
| Capacity | 2000 mAh | 1500 mAh | 1500 mAh |
| Stand by | - | Up to 280 h (3G) | Up to 140 h |
| Talk Time | - | Up to 8 h (3G) | Up to 5 h 30 min |
