| Hardware and OS | Nokia 8.1 Plus | Oppo A3s |
| Operating system | Android 9.0 Pie | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Qualcomm Snapdragon 845 SDM845, 64-Bit Processor | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Qualcomm Adreno 630 GPU | Adreno 506 |
| RAM | 6GB | |
| Internal memory | | 16 GB, 2 GB RAM |
| Internal Storage | 128GB | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | microSD, microSDHC, microSDXC | |
| User Interface | Yes | |
| Display | Nokia 8.1 Plus | Oppo A3s |
| Type | IPS capacitive touchscreen | IPS LCD |
| Size | 6.39 inches FHD | 6.2" inc |
| Resolution | 1080 x 2246 Pixels, 24 bit color depth | 720 x 1520 px |
| Touchscreen | No | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | ~390 ppi | 271 PPI |
| Protection | Yes Corning Gorilla Glass 5 | |
| Colors | 16 colors | 16M |
| Features | FHD display, ~ 390 PPI Pixel Density, Capacitive, Multi-touch, Scratch Resistant, 2.5D curved glass screen, 1140:1 contrast ratio, full lamination technology, Corning Gorilla Glass, 500 cd/m2, 96% NTSC | |
| Connectivity | Nokia 8.1 Plus | Oppo A3s |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | | HSDPA 850 / 900 / 2100 |
| 4G Network | Yes | LTE |
| Wi-Fi | a, b, g, n, Wi-Fi Hotspot, Wi-Fi Direct | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| NFC | No | |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | | 4.2, A2DP, LE |
| SIM | Nano SIM | |
| Edge | | Yes |
| Dual SIM | Hybrid Dual SIM (Nano-SIM, Nano-SIM/microSD) | |
| GPRS | | Yes |
| Wireless Charging | No | |
| GPS | GPS, A-GPS, GLONASS, BeiDou | Yes, with A-GPS |
| Speed | LTE : 850 / 1900 / 1800 / 2100 / 2600 MHz LTE-TDD : 2300 MHz (Band 40) LTE-TDD : 2500 MHz (Band 41) LTE-TDD : 2600 MHz (Band 38) LTE : 700 MHz (Band 12) | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | 2.0, Micro USB | microUSB 2.0, USB On-The-Go |
| Camera | Nokia 8.1 Plus | Oppo A3s |
| Image | 8000 x 6000 Pixels | |
| Main camera | 48 MP, 8 MP (ultra-wide angle), 5 MP | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | Yes with dual-LED flashlight | LED flash, HDR, panorama |
| Video | 2160p@30fps, 1080p@30fps (gyro-EIS) | 1080p@30fps |
| Selfie camera | 16 Megapixels with F2.0 Aperture, Carl Zeiss Lens | 8 MP, Single |
| Multimedia | Nokia 8.1 Plus | Oppo A3s |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | yes | Yes |
| Radio | Yes | FM radio |
| Design | Nokia 8.1 Plus | Oppo A3s |
| Colors | | Red, Dark Purple |
| Waterproof | No | |
| Dimensions | 76.45 mm x 157.19 mm x 7.98 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 180 g | 168 g |
| Battery | Nokia 8.1 Plus | Oppo A3s |
| Capacity | 3500 mAh Lithium-Polymer | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Placement | Non-Removable | |
| Other | Nokia 8.1 Plus | Oppo A3s |
| Release date | | 2018, July |
| Sensors | Accelerometer, Ambient Light Sensor, Barometer, E Compass, Gyroscope, Hall Sensor, Fingerprint Sensor (In-Display), ANT | Accelerometer, proximity, compass |
