| Samsung Galaxy A51 5G |
Oppo A3s |
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| Hardware and OS | Samsung Galaxy A51 5G | Oppo A3s |
| Operating system | Android 10, One UI 2 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (2x2.2 GHz Cortex-A77 & 6x1.8 GHz Cortex A55) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Exynos 980 (8 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Mali-G76 MP5 | Adreno 506 |
| Internal memory | 128GB 6GB RAM, 128GB 8GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (uses shared SIM slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Samsung Galaxy A51 5G | Oppo A3s |
| Type | Super AMOLED | IPS LCD |
| Size | 6.5 inches, 102.0 cm2 | 6.2" inc |
| Resolution | 1080 x 2400 pixels, 20:9 ratio | 720 x 1520 px |
| Touchscreen | capacitive touchscreen | |
| Protection | Corning Gorilla Glass 3 | |
| 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 | Samsung Galaxy A51 5G | Oppo A3s |
| Camera | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 12 MP, f/2.2, 123?? (ultrawide) 5 MP, f/2.4, (macro) 5 MP, f/2.2, (depth) | |
| Features | LED flash, panorama, HDR | |
| Video | 4K@30fps, 1080p@30/120fps; gyro-EIS | |
| Selfie camera | Samsung Galaxy A51 5G | Oppo A3s |
| Camera | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm | |
| Features | HDR | |
| Video | 4K@30fps, 1080p@30fps | |
| Connectivity | Samsung Galaxy A51 5G | Oppo A3s |
| 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 / 1900 / 2100 - SM-A516B/DS | HSDPA 850 / 900 / 2100 |
| 4G Network | 1, 3, 4, 5, 7, 8, 12, 20, 28, 38, 40, 41 - SM-A516B/DS | 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 |
| 5G Network | 41, 78 SA/NSA/Sub6 - SM-A516B/DS | |
| Edge | Yes | |
| GPRS | Yes | |
| CDMA | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A, 5G | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| NFC | Yes | |
| USB | USB Type-C 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| Technology | GSM / HSPA / LTE / 5G | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Camera | Samsung Galaxy A51 5G | 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 | Samsung Galaxy A51 5G | Oppo A3s |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | FM radio, RDS, recording | FM radio |
| Design | Samsung Galaxy A51 5G | Oppo A3s |
| Colors | Prism Cube Black, Prism Cube White, Prism Cube Pink | Red, Dark Purple |
| Body build | Glass front (Gorilla Glass 3), plastic back, aluminum frame | |
| Dimensions | 158.9 x 73.6 x 8.7 mm (6.26 x 2.90 x 0.34 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 187 g (6.60 oz) | 168 g |
| SIM | Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by) | |
| Battery | Samsung Galaxy A51 5G | Oppo A3s |
| Type | Li-Po 4500 mAh, non-removable | |
| Charging | Fast charging 15W | |
| Battery capacity | 4230 mAh, Non-removable Li-Ion | |
| Other | Samsung Galaxy A51 5G | Oppo A3s |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass | |
| Features | Samsung Galaxy A51 5G | Oppo A3s |
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
