Phone Comparison - Micromax Bolt A40 vs Spice Stellar Glamour Mi-436 vs Karbonn A12+
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| Manufacturer | Micromax | Spice | Karbonn |
| Announced | September 2013 | August 2013 | October 2013 |
| Status | Available - September 2013 | Available - September 2013 | Available - October 2013 |
| Colors | Black | Blue, Red/black | White, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
125 x 65.8 x 11.5 mm (4.92 x 2.59 x 0.45 in) |
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| Weight | - | 100 g (3.53 oz) | - |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | No | HSDPA 2100 | HSDPA 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.3.5 (Gingerbread) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | 1 GHz Cortex-A5, Spreadtrum SC6820 | Dual-core 1.2 GHz | Dual-core 1.3 GHz, MTK 6572 |
| GPU | Mali-400 | - | Mali-400MP |
| RAM | 512 MB | 512 MB | 512 MB |
| Internal Memory | 512 MB (75 MB user available) | 4 GB | 4 GB (1.27 GB for apps, 1.24 GB user available) |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | TFT touchscreen | Capacitive touchscreen | IPS LCD Capacitive Touchscreen, Wide Viewing Angle |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 4.0 inches | 4.0 inches |
| Resolution | 480 x 854 pixels (218 ppi) | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | - | 55.48% | - |
| 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 | 2 MP, 1600x1200 pixels | 5 MP, 2592х1944 pixels | 5 MP, 2592х1944 pixels |
| Flash | LED Flash | No | LED flash |
| Features | Fixed Focus, Geo-tagging | - | Auto-focus, Geo-tagging, Face Detection, Panorama |
| Video | Yes, 480p | Yes | Yes, 720p |
| Front Camera | Yes, VGA [Similar] | Yes, 1.3 MP [Similar] | Yes, 2 MP [Similar] |
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| GPRS | Yes | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes |
| Edge | Yes | Class 12 | Yes |
| 3G | No | HSDPA, HSUPA | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, 2.1 | Yes, v3.0 | Yes, v2.0 A2DP, EDR |
| 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 | Yes, microUSB | Yes, microUSB v2.0 |
| GPS | No | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML | HTML |
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| Internal | 512 MB (75 MB user available), 512 MB RAM | 4 GB, 512 MB RAM | 4 GB (1.27 GB for apps, 1.24 GB user available), 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 | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1500 mAh | 1400 mAh | 1400 mAh |
| Stand by | Up to 175 h | Up to 170 h | - |
| Talk Time | Up to 4 h 30 min | Up to 4 h 30 min | - |
