| Hardware and OS | Karbonn Alfa A18 | |
| Operating system | Android v6.0 (Marshmallow) | |
| Processor | Dual core | |
| RAM | 512 MB | |
| Internal Storage | 4 GB | |
| Expandable memory | Yes Up to 32 GB | |
| Display | Karbonn Alfa A18 | other phones |
| Type | TFT | |
| Size | 4.0 inches | |
| Resolution | 480 x 800 pixels | |
| Pixel Density | 233 ppi | |
| Touchscreen | Yes Capacitive Touchscreen | |
| Screen to body ratio calculated | 56.71 % | |
| Connectivity | Karbonn Alfa A18 | other phones |
| Network support | 3G, 2G | |
| WI-FI | Yes Wi-Fi 802.11, b/g/n | |
| Gps | Yes with A-GPS | |
| Bluetooth | Yes | |
| NFC | No | |
| Dual SIM | Dual SIM, GSM GSM | |
| USB connectivity | microUSB 2.0 | |
| Camera | Karbonn Alfa A18 | other phones |
| Image | 1600 x 1200 Pixels | |
| Camera features | Digital Zoom | |
| Flash | No | |
| Autofocus | No | |
| Optical image stabilisation | No | |
| Multimedia | Karbonn Alfa A18 | other phones |
| Audio jack | 3.5 mm | |
| FM radio | Yes | |
| Loudspeaker | Yes | |
| Design | Karbonn Alfa A18 | other phones |
| Height | 124.5 mm | |
| Width | 64.5 mm | |
| Thickness | 10.6 mm | |
| Weight | 112 grams | |
| Colours | Black, Grey, White | |
| Battery | Karbonn Alfa A18 | other phones |
| Capacity | 1400 mAh | |
| Type | Li-ion | |
| Other | Karbonn Alfa A18 | other phones |
| Fingerprint sensor | No | |
| Other sensors | Accelerometer | |
