Phone Comparison - Karbonn A99 vs Karbonn Smart A12 Star vs XOLO A1000s
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| Manufacturer | Karbonn | Karbonn | XOLO |
| Announced | October 2013 | June 2014 | August 2014 |
| Status | Available - October 2013 | Available - June 2014 | Available - August 2014 |
| Colors | White, Black | White, Black | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
124.2 x 64.2 x 10.1 mm (4.89 x 2.53 x 0.4 in) |
128 x 63 x 8.98 mm (5.04 x 2.48 x 0.35 in) |
| Weight | - | 130 g (4.59 oz) | - |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 2100 | HSDPA 2100 | HSDPA 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2.2 (Jelly Bean) | Android OS, v4.4.2 (KitKat) | Android OS, v4.4.2 (KitKat) |
| Processor | Dual-core 1.3 GHz, MTK 6572 | Dual-core 1.2 GHz, MTK 6572 | Dual-core 1.0 GHz, MediaTek MT6572M |
| GPU | Mali-400MP | Mali-400MP | Mali-400MP |
| RAM | 512 MB | 512 MB | 1 GB |
| Internal Memory | 4 GB | 4 GB (2.4 GB internal storage) | 4 GB ROM |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | IPS LCD Capacitive Touchscreen, Wide Viewing Angle | IPS LCD Capacitive Touchscreen, Wide Viewing Angle | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 256K colors |
| Size | 3.97 inches | 4.0 inches | 5.0 inches |
| Resolution | 480 x 800 pixels (235 ppi) | 480 x 800 pixels (233 ppi) | 480 x 854 pixels (196 ppi) |
| Screen-to-Body Ratio | - | 57.23% | 85.37% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio | FM radio |
| 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 | - | Geo-tagging, Face Detection, Panorama | Fixed focus, Geo-tagging, Panorama, Face And Smile Detection, HDR |
| Video | Yes, 720p | Yes, 720p | Yes, 720p |
| Front Camera | Yes [Similar] | Yes, VGA [Similar] | Yes, VGA [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, 21.1 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v2.0 A2DP, EDR | Yes, v2.0 A2DP, EDR | Yes, v3.0 |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML | HTML5 |
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| Internal | 4 GB ROM, 512 MB RAM | 4 GB (2.4 GB internal storage), 512 MB RAM | 4 GB ROM, 1 GB 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 | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1400 mAh | 1400 mAh | 2000 mAh |
| Stand by | - | Up to 300 h (2G) | Up to 650 h (2G) Up to 590 h (3G) |
| Talk Time | - | - | Up to 29 h (2G) Up to 13 h (3G) |
