| Hardware and OS | Zen Ultrafone 303 | |
| Operating System | Android v4.0 (Ice Cream Sandwich) | |
| Processor | 1 GHz | |
| RAM | 256 MB | |
| Internal Memory | 512 MB | |
| Expandable Memory | yes Up to 32 GB | |
| SIM Slot(s) | Dual SIM | |
| Display | Zen Ultrafone 303 | other phones |
| Screen Size | 4 inches (10.16 cm) | |
| Screen Resolution | 480 x 800 pixels | |
| Display Type | IPS LCD | |
| Pixel Density | 233 ppi | |
| Touch Screen | yes Capacitive Touchscreen | |
| Main Camera | Zen Ultrafone 303 | other phones |
| Resolution | 3.2 MP Primary Camera
| |
| Image Resolution | 2048 x 1536 Pixels | |
| Flash | yes LED Flash | |
| Camera Features | Digital Zoom | |
| Front Camera | Zen Ultrafone 303 | other phones |
| Resolution | 0.3 MP Primary Camera
| |
| Connectivity | Zen Ultrafone 303 | other phones |
| Network | 2G: Available | |
| SIM 1 | 2G Bands: GSM 900 / 1800
| |
| SIM 2 | 2G Bands: GSM 900 / 1900
| |
| SIM Size | SIM1: Micro | |
| Bluetooth | yes | |
| Wi-Fi | yes Wi-Fi 802.11 | |
| Multimedia | Zen Ultrafone 303 | other phones |
| Audio Jack | 3.5 mm | |
| FM Radio | yes | |
| Loudspeaker | yes | |
| Design | Zen Ultrafone 303 | other phones |
| Height | 124.1 mm | |
| Width | 65.3 mm | |
| Thickness | 10.8 mm | |
| Weight | 95 grams | |
| Colours | Black, White, Blue | |
| Battery | Zen Ultrafone 303 | other phones |
| Type | Li-ion | |
| Capacity | 1500 mAh | |
| Standby time | Up to 120 Hours(2G) | |
| TalkTime | Up to 6 Hours(2G) | |
| Features | Zen Ultrafone 303 | other phones |
| Applications | Zen Store, HS18, Notebook | |
| Other Sensors | Proximity sensor, Accelerometer, Gyroscope | |
