| Hardware and OS | Samsung Galaxy S6 (USA) | Oppo A3s |
| Operating system | Android 5.0.2 (Lollipop), upgradable to 5.1 (Lollipop), TouchWiz UI | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (4x2.1 GHz Cortex-A57 & 4x1.5 GHz Cortex-A53) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Exynos 7420 Octa (14 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Mali-T760MP8 | Adreno 506 |
| Internal memory | 32GB 3GB RAM, 64GB 3GB RAM, 128GB 3GB RAM | 16 GB, 2 GB RAM |
| External memory | No | microSD, up to 256 GB (dedicated slot) |
| Display | Samsung Galaxy S6 (USA) | Oppo A3s |
| Type | Super AMOLED | IPS LCD |
| Size | 5.1 inches, 71.7 cm2(~70.8% screen-to-body ratio) | 6.2" inc |
| Resolution | 1440 x 2560 pixels, 16:9 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Protection | Corning Gorilla Glass 4 | |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | | 271 PPI |
| Colors | White Pearl, Black Sapphire, Gold Platinum | 16M |
| Connectivity | Samsung Galaxy S6 (USA) | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - G920V, G920P | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 - G920V | HSDPA 850 / 900 / 2100 |
| 4G Network | 2, 3, 4, 5, 7, 13 - G920V | LTE |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 4.1, A2DP, LE, aptX | 4.2, A2DP, LE |
| Edge | | Yes |
| Infrared port | Yes | |
| GPRS | | Yes |
| NFC | Yes | |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A Cat6 300/50 Mbps, EV-DO Rev.A 3.1 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| CDMA | CDMA 800 / 1900 - G920V, G920P, G920R | |
| USB | microUSB 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| Technology | GSM / CDMA / HSPA / EVDO / LTE | |
| Camera | Samsung Galaxy S6 (USA) | 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 |
| Main Camera | Samsung Galaxy S6 (USA) | Oppo A3s |
| Camera | 16 MP, f/1.9, 28mm (wide), 1/2.6", 1.12??m, AF, OIS | |
| Features | LED flash, auto-HDR, panorama | |
| Video | 4K@30fps, 1080p@30/60fps, 720p@120fps, HDR, stereo sound rec., OIS, gyro-EIS | |
| Multimedia | Samsung Galaxy S6 (USA) | Oppo A3s |
| 3.5 mm Jack | Yes | Yes |
| Radio | No | FM radio |
| Multimedia | 24-bit/192kHz audio
| |
| Loudspeaker | Yes | |
| Selfie camera | Samsung Galaxy S6 (USA) | Oppo A3s |
| Camera | 5 MP, f/1.9, 22mm (wide) | |
| Features | Dual video call, Auto-HDR | |
| Video | 1440p@30fps | |
| Design | Samsung Galaxy S6 (USA) | Oppo A3s |
| Body build | Glass front (Gorilla Glass 4), glass back (Gorilla Glass 4), aluminum frame | |
| SIM | Nano-SIM | |
| Colors | | Red, Dark Purple |
| Dimensions | 143.5 x 70.6 x 6.9 mm (5.65 x 2.78 x 0.27 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 140 g (4.94 oz) | 168 g |
| Battery | Samsung Galaxy S6 (USA) | Oppo A3s |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Type | Li-Ion 2550 mAh, non-removable | |
| Charging | Fast charging 15W
PMA wireless charging | |
| Talk time | Up to 23 h (3G) | |
| Other | Samsung Galaxy S6 (USA) | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
| Features | Samsung Galaxy S6 (USA) | Oppo A3s |
| Sensors | Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer, heart rate, SpO2 | |
