| Hardware and OS | Doogee N20 | Oppo A3s |
| Operating system | Android 9.0 Pie | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | 2.0GHz4X Cortex-A53 up to 1.5GHz | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | IMG 9XM-HP8 (PowerVR GM9446), 970 MHz | Adreno 506 |
| RAM | 4 GB | |
| Internal memory | | 16 GB, 2 GB RAM |
| Internal Storage | 64 GB | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | Micro SD Card (T-Flash Card) up to 128GB | |
| User Interface | Yes | |
| Display | Doogee N20 | Oppo A3s |
| Type | IPS | IPS LCD |
| Size | 6.3" FHD Waterdrop Screen | 6.2" inc |
| Resolution | 1080*2280 | 720 x 1520 px |
| Touchscreen | Yes | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | 428 ppi | 271 PPI |
| Colors | 16M Colors | 16M |
| Connectivity | Doogee N20 | Oppo A3s |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | | HSDPA 850 / 900 / 2100 |
| NFC | No | |
| 4G Network | Yes | LTE |
| Wi-Fi | Yes | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM | Nano SIM | |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Dual SIM | Dual SIM Cards Standby / Nano-SIM, Nano-SIM/ Nano-SIM TF Card | |
| Bluetooth | | 4.2, A2DP, LE |
| Wireless Charging | No | |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | Yes | Yes, with A-GPS |
| Speed | 4G (FDD): B1/3/7/8/20 | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | Yes | microUSB 2.0, USB On-The-Go |
| Camera | Doogee N20 | Oppo A3s |
| Image | Yes | |
| Main camera | 16.0MP 8.0MP 8.0MP f/2.0 130?? Wide-angle LED Flash | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | Dual LED | LED flash, HDR, panorama |
| Video | | 1080p@30fps |
| Selfie camera | 16.0MP 16.0MP f/2.0 80?? Wide-angle | 8 MP, Single |
| Multimedia | Doogee N20 | Oppo A3s |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Video Playback | Yes | |
| Video Out | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | yes | Yes |
| Radio | Yes | FM radio |
| Design | Doogee N20 | Oppo A3s |
| Waterproof | No | |
| Colors | | Red, Dark Purple |
| Dimensions | 158.96*77.1*8.4mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 180 g | 168 g |
| Battery | Doogee N20 | Oppo A3s |
| Capacity | 4350mAh Built-in Polymer Battery 5V/2A | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Doogee N20 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | Rear Fingerprint 0.1s Unlocking 360?? Identification, GPS, G-sensor, Proximity sensor, and Ambient light senor | Accelerometer, proximity, compass |
