| Hardware and OS | Karbonn Smart A12 | |
| Operating System | Android v4.0 (ICS) | |
| Processor | 1 GHz, Single Core Processor | |
| Internal Memory | 4 GB | |
| Memory Card Slot | Yes, upto 32 GB | |
| Dual Sim | Yes | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | Karbonn Smart A12 | other phones |
| Screen Size | 4.5 inches, 854 x 480 pixels | |
| Display Type | Color TFT screen | |
| Pixel Density | ~218 PPI | |
| Touch Screen | Yes | |
| Display aspect ratio | 16:9 | |
| Connectivity | Karbonn Smart A12 | other phones |
| 3G Network | Yes | |
| Bluetooth | Yes | |
| EDGE | Yes | |
| GPRS | Yes | |
| GPS | Yes | |
| USB | Yes | |
| Wifi | Yes, with wifi-hotspot | |
| Camera | Karbonn Smart A12 | other phones |
| Main camera | 5 MP with autofocus | |
| Flash | Yes, LED | |
| Selfie camera | No | |
| Multimedia | Karbonn Smart A12 | other phones |
| Headphone jack | Yes | |
| Email | Yes | |
| FM Radio | Yes | |
| Music | MP3, MIDI, WAV, AMR, AAC, AAC | |
| Video | MP4, 3GP, AVI, H.263, H.264 | |
| Browser | Yes, supports HTML | |
| Java | No | |
| Supports | MMS, Instant Messaging, Voice Recording | |
| Design | Karbonn Smart A12 | other phones |
| Case type | Classic (Candybar) | |
| Dimensions | 135 x 66 x 11 mm | |
| Weight | 164 g | |
| Battery | Karbonn Smart A12 | other phones |
| Battery capacity | 1800 mAh | |
| Type | Removable Battery | |
| StandBy Time | 180 hours | |
| Talk Time | 4 hours | |
