| Hardware and OS | Nokia T20 | Oppo A3s |
| Operating system | Android 11 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Unisoc T610 (12 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Mali G52 | Adreno 506 |
| Internal memory | 32GB 3GB RAM, 64GB 4GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (dedicated slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Nokia T20 | Oppo A3s |
| Type | IPS LCD, 400 nits (typ) | IPS LCD |
| Size | 10.4 inches, 307.9 cm2 | 6.2" inc |
| Resolution | 1200 x 2000 pixels, 5:3 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Protection | Scratch-resistant glass | |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | | 271 PPI |
| Colors | | 16M |
| Main Camera | Nokia T20 | Oppo A3s |
| Camera | 8 MP, AF | |
| Video | 1080p@30fps | |
| Selfie camera | Nokia T20 | Oppo A3s |
| Camera | 5 MP | |
| Video | Yes | |
| Connectivity | Nokia T20 | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE (unspecified) | LTE |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 5.0, A2DP, LE | 4.2, A2DP, LE |
| NFC | No | |
| Edge | | Yes |
| GPRS | | Yes |
| Technology | GSM / HSPA / LTE | |
| GPS | Yes / with A-GPS (LTE model only) | Yes, with A-GPS |
| Speed | HSPA, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band | |
| USB | USB Type-C 2.0 | microUSB 2.0, USB On-The-Go |
| Camera | Nokia T20 | Oppo A3s |
| Main camera | | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | | LED flash, HDR, panorama |
| Video | | 1080p@30fps |
| Selfie camera | | 8 MP, Single |
| Multimedia | Nokia T20 | Oppo A3s |
| Loudspeaker | Yes, with stereo speakers | |
| 3.5 mm Jack | Yes | Yes |
| Radio | FM radio | FM radio |
| Design | Nokia T20 | Oppo A3s |
| Body build | Glass front, aluminum back | |
| Body | Splash resistant | |
| Colors | Deep Ocean | Red, Dark Purple |
| Dimensions | 247.6 x 157.5 x 7.8 mm (9.75 x 6.20 x 0.31 in) | 156.2 x 75.6 x 8.2 mm |
| SIM | Nano-SIM | |
| Weight | 465 g (Wi-Fi), 470 g (LTE) (1.03 lb) | 168 g |
| Features | Nokia T20 | Oppo A3s |
| Sensors | Unspecified | |
| Battery | Nokia T20 | Oppo A3s |
| Type | Li-Po 8200 mAh, non-removable | |
| Charging | Charging 15W | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Nokia T20 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
