| Hardware and OS | Etuline S4521 | |
| Operating system | Android 4.2 | |
| Processor | MediaTek MT6572, 1200 MHz | |
| Processor cores number | 2 | |
| RAM | 512 Mb | |
| Internal Storage | 4 GB | |
| Memory Card Slot | yes, volume of up to 32 GB | |
| GPU | Mali-400 MP | |
| Display | Etuline S4521 | other phones |
| Type | colored TFT, sensor | |
| Size | 4.5" | |
| Resolution | 854x480 | |
| Pixel Density | 218 | |
| Touchscreen | multitouch, capacitive | |
| Aspect Ratio | 16:9 | |
| Automatic display rotation | yes | |
| Connectivity | Etuline S4521 | other phones |
| Standard | GSM 900/1800/1900, 3G | |
| Interfaces | Wi-Fi, Bluetooth 3.0, USB | |
| Multi SIM mode | alternate | |
| SIM-card amount | 2 | |
| Camera | Etuline S4521 | other phones |
| Main camera | 5 MP | |
| Front camera | 0.3 megapixels | |
| Video Recording | yes | |
| Multimedia | Etuline S4521 | other phones |
| Audio | MP3, FM-radio | |
| Headphone jack | 3.5 mm | |
| Design | Etuline S4521 | other phones |
| Case type | classic | |
| Height | 132 mm | |
| Width | 67.6 mm | |
| Thickness | 10.5 mm | |
| Weight | 142 grams | |
| Battery | Etuline S4521 | other phones |
| Capacity | 1630 mA?h | |
| Connector type for charging | micro-USB | |
| Other | Etuline S4521 | other phones |
| Sensors | illumination sensor, approaching sensor | |
