| Hardware and OS | Karbonn Smart A12 Star | |
| Operating system | Android 4.4.2 (KitKat) | |
| Processor | Dual-core 1.2 GHz | |
| Internal memory | 4 GB, 512 MB RAM | |
| External memory | microSD, up to 32 GB | |
| Display | Karbonn Smart A12 Star | other phones |
| Type | IPS LCD | |
| Size | 4" inc | |
| Resolution | 480 x 800 px | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 57.1% | |
| Display area | 45.5 cm2 | |
| Display aspect ratio | 5:3 (height:width) | |
| Pixel Density | 233 PPI | |
| Colors | 16M | |
| Connectivity | Karbonn Smart A12 Star | other phones |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | |
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | |
| Network | GSM / HSPA | |
| SIM card | Dual SIM (Micro-SIM, dual stand-by) | |
| Bluetooth | 2.0 | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA | |
| USB | microUSB 2.0 | |
| Camera | Karbonn Smart A12 Star | other phones |
| Main camera | 5 MP, Single | |
| Specs | 5 MP | |
| Features | LED flash | |
| Video | Yes | |
| Selfie camera | 0.3 MP, Single | |
| Multimedia | Karbonn Smart A12 Star | other phones |
| 3.5 mm Jack | Yes | |
| Radio | FM radio | |
| Design | Karbonn Smart A12 Star | other phones |
| Colors | Black | |
| Dimensions | 124.2 x 64.2 x 10.1 mm | |
| Weight | 130 g | |
| Battery | Karbonn Smart A12 Star | other phones |
| Battery capacity | 1400 mAh, Li-Ion | |
| Battery life | Stand by time- Up to 300 h
| |
| Other | Karbonn Smart A12 Star | other phones |
| SAR | SAR EU - 0.79 W/kg (head) | |
| Release date | 2014, July | |
| Sensors | Accelerometer, proximity | |
