| Hardware and OS | OPPO Muse R821 | |
| Operating system | Android 4.2 | |
| Processor | MediaTek MT6572 | |
| Processor cores number | 2 | |
| RAM | 512 Mb | |
| Internal Storage | 2.50 GB | |
| Memory Card Slot | yes | |
| GPU | Mali-400 MP | |
| Display | OPPO Muse R821 | other phones |
| Type | colored IPS, sensor | |
| Size | 4" | |
| Resolution | 800x480 | |
| Pixel Density | 233 | |
| Touchscreen | multitouch, capacitive | |
| Aspect Ratio | 5:3 | |
| Connectivity | OPPO Muse R821 | other phones |
| Standard | GSM 900/1800/1900, 3G | |
| Interfaces | Wi-Fi, Bluetooth 2.1, USB | |
| Multi SIM mode | alternate | |
| SIM | regular micro SIM | |
| Camera | OPPO Muse R821 | other phones |
| Main camera | 3 MP, 2048x1536 | |
| Front camera | 0.3 megapixels | |
| Video Recording | yes | |
| Video resolution max | 1280x720 | |
| Multimedia | OPPO Muse R821 | other phones |
| Audio | MP3, AAC, WAV, WMA, FM-radio | |
| Headphone jack | 3.5 mm | |
| Design | OPPO Muse R821 | other phones |
| Case type | classic | |
| Height | 123 mm | |
| Width | 63.5 mm | |
| Thickness | 9.9 mm | |
| Weight | 124 grams | |
| Battery | OPPO Muse R821 | other phones |
| Capacity | 1700 mA?h | |
| Battery | removable panels | |
| Battery type | Li-Ion | |
| Connector type for charging | micro-USB | |
| Standby time | 280 hours | |
| Talk time | 6 hours | |
| Other | OPPO Muse R821 | other phones |
| Sensors | illumination sensor, approaching sensor | |
