| Hardware and OS | Karbonn Alfa A90 | |
| Operating System | Android v4.4 (Kitkat) | |
| Processor | Single core, 1 GHz | |
| RAM | 512 MB | |
| Internal Memory | 4 GB | |
| Expandable Memory | yes Up to 32 GB | |
| SIM Slot(s) | Dual SIM, GSM GSM | |
| Display | Karbonn Alfa A90 | other phones |
| Screen Size | 4.0 inches (10.16 cm) | |
| Screen Resolution | 480 x 800 pixels | |
| Display Type | TFT | |
| Pixel Density | 233 ppi | |
| Screen Protection | No | |
| Touch Screen | yes Capacitive Touchscreen, Multi-touch | |
| Main Camera | Karbonn Alfa A90 | other phones |
| Resolution | 2 MP Primary Camera
| |
| Image Resolution | 1600 x 1200 Pixels | |
| Flash | yes Dual LED Flash | |
| Camera Features | Digital Zoom | |
| Optical Image Stabilisation | No | |
| Front Camera | Karbonn Alfa A90 | other phones |
| Resolution | 1.3 MP Primary Camera
| |
| Flash | No | |
| Autofocus | No | |
| Connectivity | Karbonn Alfa A90 | other phones |
| Network | 4G: Not Available,
3G: Available, 2G: Available | |
| SIM 1 | 3G Bands: UMTS 2100 MHz 2G Bands: GSM 1800 / 900 MHz
GPRS: Available EDGE: Available | |
| SIM 2 | 2G Bands: GSM 1800 / 900 MHz
| |
| Bluetooth | yes v4.0 | |
| GPS | yes with A-GPS | |
| NFC | No | |
| Wi-Fi | yes Wi-Fi 802.11, b/g/n | |
| Wi-Fi Features | Mobile Hotspot | |
| USB Connectivity | microUSB 2.0 | |
| Multimedia | Karbonn Alfa A90 | other phones |
| Audio Jack | 3.5 mm | |
| FM Radio | yes | |
| Loudspeaker | yes | |
| Design | Karbonn Alfa A90 | other phones |
| Colours | Black, White | |
| Battery | Karbonn Alfa A90 | other phones |
| Type | Li-ion | |
| Capacity | 1400 mAh | |
| User Replaceable | yes | |
| Quick Charging | No | |
| USB Type-C | No | |
| Features | Karbonn Alfa A90 | other phones |
| Fingerprint Sensor | No | |
| Other Sensors | Accelerometer | |
