| Hardware and OS | Samsung Galaxy S9 SD845 | Oppo A3s |
| Operating system | Android 8.0 Oreo | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa Core 4??2.8GHz Kryo 385, 4??1.8GHz Kryo 385 CPU Clock | 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 | 64GB/128GB/256GB | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Memory Card Slot | External Memory Supports Up to 256GB (dedicated slot) | |
| User Interface | Samsung Experience 9.0 UI | |
| Display | Samsung Galaxy S9 SD845 | Oppo A3s |
| Type | Super AMOLED capacitive touchscreen | IPS LCD |
| Size | 6.2 inches QHD | 6.2" inc |
| Resolution | 2960 x 1440 Pixels, 24 bit color depth | 720 x 1520 px |
| Touchscreen | Yes Multi Touch Support | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | ~ 531 ppi | 271 PPI |
| Protection | Yes Corning Gorilla Glass 5 | |
| Colors | 16M Colors | 16M |
| Features | QHD display, ~531 PPI, Always-On Display, Capacitive Color, LED Notifications, Corning Gorilla Glass 5, Dual Edge Display, Frameless, Multi-touch, Scratch Resistant, VR Headset Support, 18:9 Aspect Ratio | |
| Connectivity | Samsung Galaxy S9 SD845 | 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 | Wi-Fi 802.11 a/b/g/n/ac, 802.11n 5GHz, Wi-Fi Direct, Dual Band, Wi-Fi Hotspot, VHT80 MU-MiMO, 1024-QAM | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| NFC | yes | |
| 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 | Single SIM (Nano) Dual SIM Optional | |
| GPRS | | Yes |
| Wireless Charging | Yes | |
| GPS | A-GPS, Beidou, GLONASS, GPS, Galileo | Yes, with A-GPS |
| Speed | LTE : 700 MHz Class 13 LTE : 700 MHz Class 17 LTE : 1700 / 2100 MHz LTE : 800 / 900 / 1900 / 1800 / 2100 / 2600 MHz LTE-TDD : 1900 MHz (Band 39) 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 | Type-C USBv3.1 With OTG, Charging and Mass Storage Function | microUSB 2.0, USB On-The-Go |
| Camera | Samsung Galaxy S9 SD845 | Oppo A3s |
| Image | 4032 x 3024 Pixels | |
| Main camera | 12 Megapixels, 12 Megapixels (Dual Rear Camera) | 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 | | 1080p@30fps |
| Selfie camera | 8 Megapixels with 80 Degree Wide Angle Lens, F1.7 Aperture, Laser autofocus, PDAF Focus, Dual Video Call, Auto HDR, Pixel Size 1.22??m, Sensor 1/3.6-inch | 8 MP, Single |
| Multimedia | Samsung Galaxy S9 SD845 | Oppo A3s |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Video Playback | Yes Support 3GP, ASF, M4V, H.264, MKV, AVI, xVID, WMV, FLV, MP4, H.265 | |
| Video Out | Yes | |
| 3.5 mm Jack | yes | Yes |
| Ring Tones | Yes | |
| Radio | Yes | FM radio |
| Design | Samsung Galaxy S9 SD845 | Oppo A3s |
| Colors | | Red, Dark Purple |
| Dimensions | 73.8 mm x 158.1 mm x 8.5 mm | 156.2 x 75.6 x 8.2 mm |
| Waterproof | No | |
| Weight | 189 Grams (With Battery) | 168 g |
| Battery | Samsung Galaxy S9 SD845 | Oppo A3s |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Capacity | 3,500 mAh Lithium-Polymer | |
| Placement | Non-Removable | |
| Other | Samsung Galaxy S9 SD845 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | Fingerprint, Accelerometer, Compass, Gravity, Gyroscope, Hall, Heart Rate, Light sensor, Proximity, Barometer | Accelerometer, proximity, compass |
