| Nokia XR21 |
Oppo A3s |
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| Hardware and OS | Nokia XR21 | Oppo A3s |
| Operating system | Android 12 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm SM6375 Snapdragon 695 5G (6 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 619 | Adreno 506 |
| Internal memory | 128GB 6GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (uses shared SIM slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Nokia XR21 | Oppo A3s |
| Type | IPS LCD, 120Hz, 450 nits (typ), 550 nits (HBM) | IPS LCD |
| Size | 6.49 inches, 101.7 cm2(~77.0% screen-to-body ratio) | 6.2" inc |
| Resolution | 1080 x 2400 pixels, 20:9 ratio | 720 x 1520 px |
| Touchscreen | capacitive touchscreen | |
| Protection | Corning Gorilla Glass Victus | |
| Screen-to-Body Ratio | 81.2% | |
| Display area | 95.9 cm2 | |
| Display aspect ratio | 19:9 (height:width) | |
| Pixel Density | 271 PPI | |
| Colors | 16M | |
| Connectivity | Nokia XR21 | Oppo A3s |
| 5G Network | 1, 2, 3, 5, 7, 20, 25, 28, 40, 41, 66, 71, 77, 78, 79 SA/NSA | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| NFC | Yes (market/region dependent) | |
| 4G Network | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 43, 48, 66, 71 | LTE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot | |
| Network | GSM / HSPA / LTE | |
| Technology | GSM / HSPA / LTE / 5G | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Bluetooth | 5.1, A2DP, LE, aptX Adaptive | 4.2, A2DP, LE |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA, LTE-A, 5G | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | USB Type-C 2.0, OTG | microUSB 2.0, USB On-The-Go |
| Main Camera | Nokia XR21 | Oppo A3s |
| Camera | 64 MP, f/1.8, (wide), 1/2", PDAF 8 MP, f/2.2, (ultrawide), 1/4.0", 1.12µm | |
| Features | Dual-LED dual-tone flash, second LED flash, HDR, panorama | |
| Video | 4K@30fps, 1080p@30fps | |
| Selfie camera | Nokia XR21 | Oppo A3s |
| Camera | 16 MP, f/2.4 (wide) | |
| Video | 1080p@30fps | |
| Camera | Nokia XR21 | 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 XR21 | Oppo A3s |
| Loudspeaker | Yes, with stereo speakers | |
| 3.5 mm Jack | Yes | Yes |
| Radio | FM radio | |
| Design | Nokia XR21 | Oppo A3s |
| Body | IP68/IP69K dust/water resistant (up to 1.5m for 60 min) Drop-to-concrete resistance from up to 1.8m MIL-STD-810H compliant | |
| Body build | Glass front (Gorilla Glass Victus), plastic back, plastic frame | |
| SIM | Single SIM (Nano-SIM, eSIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by) | |
| Colors | Midnight Black, Pine Green | Red, Dark Purple |
| Dimensions | 168 x 78.6 x 10.5 mm (6.61 x 3.09 x 0.41 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 231 g (8.15 oz) | 168 g |
| Features | Nokia XR21 | Oppo A3s |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer | |
| Battery | Nokia XR21 | Oppo A3s |
| Type | Li-Po 4800 mAh, non-removable | |
| Charging | 33W wired, PD2.0, QC3 | |
| Battery capacity | 4230 mAh, Non-removable Li-Ion | |
| Other | Nokia XR21 | Oppo A3s |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass |
