| Hardware and OS | Karbonn A12 | |
| Operating system | Android 4.2 (Jelly Bean) | |
| Processor | Dual-core 1.3 GHz | |
| Internal memory | 4GB 512MB RAM | |
| External memory | microSDHC (dedicated slot) | |
| Display | Karbonn A12 | other phones |
| Size | 4.0 inches, 45.5 cm2 | |
| Resolution | 480 x 800 pixels, 5:3 ratio | |
| Type | IPS LCD capacitive touchscreen | |
| Main Camera | Karbonn A12 | other phones |
| Camera | 5 MP, AF | |
| Features | LED flash | |
| Video | Yes | |
| Selfie camera | Karbonn A12 | other phones |
| Camera | VGA | |
| Connectivity | Karbonn A12 | other phones |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 2100 | |
| Bluetooth | Yes | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA | |
| Technology | GSM / HSPA | |
| USB | microUSB 2.0 | |
| WLAN | Wi-Fi 802.11 b/g/n, hotspot | |
| Multimedia | Karbonn A12 | other phones |
| 3.5 mm Jack | Yes | |
| Loudspeaker | Yes | |
| Radio | FM radio | |
| Battery | Karbonn A12 | other phones |
| Capacity | Li-Ion 1400 mAh battery | |
| Design | Karbonn A12 | other phones |
| Colors | Black/White | |
| Dimensions | - | |
| Weight | - | |
| SIM | Dual SIM | |
| Features | Karbonn A12 | other phones |
| Sensors | Accelerometer, proximity | |
