Phone Comparison - Samsung Galaxy Ace Duos vs Karbonn A12 vs Karbonn A25
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| Manufacturer | Samsung | Karbonn | Karbonn |
| Announced | May 2012 | February 2013 | May 2013 |
| Status | Available - June 2012 | Available - February 2013 | Available - May 2013 |
| Colors | Black | Black/White | White, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
112.7 x 61.5 x 11.5 mm (4.44 x 2.42 x 0.45 in) |
135 x 66 x 11 mm (5.31 x 2.6 x 0.43 in) |
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| Weight | 122 g (4.3 oz) | 164 g (5.78 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 |
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 2100 - SIM 1 only | No |
| Messaging | SMS, MMS | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread) | Android OS, v4.0.4 (Ice Cream Sandwich) | Android OS, v4.0 (Ice Cream Sandwich) |
| Processor | 832 MHz | 1 GHz | Dual-core 1 GHz |
| GPU | - | - | |
| RAM | N/A | 512 MB | 512 MB |
| Internal Memory | 3 GB storage, 512 MB | 4 GB | 512 MB ROM |
| 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 | Capacitive Touchscreen | TFT capacitive touchscreen |
| Colors | 16M colors | 262K colors | - |
| Size | 3.5 inches | 4.5 inches | 5.0 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 480 x 854 pixels (218 ppi) | 480 x 800 pixels (187 ppi) |
| Screen-to-Body Ratio | 52.52% | 62.46% | - |
| 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 | 5 MP, 2592х1944 pixels | 5 MP, 2592х1944 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Face Detection | Auto focus, Geo-tagging |
| Video | Yes | Yes | Yes |
| Front Camera | No [Similar] | Yes, VGA [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes, Class 12 |
| 3G | HSDPA, 7.2 Mbps | HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps | No |
| Bluetooth | Yes, v3.0 with A2DP | Yes | Yes, v3.0 |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n, 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 | Yes, with A-GPS support |
| Browser | HTML | HTML | HTML |
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| Internal | 3GB storage, 512 MB | 4 GB, 512 MB RAM | 512 MB ROM, 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 | Standard battery, Li-Ion | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1300 mAh | 1800 mAh | 2000 mAh |
| Stand by | Up to 520 h (2G) Up to 410 h (3G) |
Up to 180 h | - |
| Talk Time | Up to 6 h 30 min (2G) Up to 16 h 40 min (3G) |
Up to 4 h | - |
