| Hardware and OS | Samsung I9500 Galaxy S4 | Oppo A3s |
| Operating system | Android 4.2.2 (Jelly Bean), upgradable to 5.0.1 (Lollipop), TouchWiz UI | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (4x1.6 GHz Cortex-A15 & 4x1.2 GHz Cortex-A7) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Exynos 5410 Octa (28 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | PowerVR SGX544MP3 | Adreno 506 |
| Internal memory | 16GB 2GB RAM, 32GB 2GB RAM, 64GB 2GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (dedicated slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Samsung I9500 Galaxy S4 | Oppo A3s |
| Type | Super AMOLED | IPS LCD |
| Size | 5.0 inches, 68.9 cm2 | 6.2" inc |
| Resolution | 1080 x 1920 pixels, 16:9 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 I9500 Galaxy S4 | Oppo A3s |
| Camera | 13 MP, f/2.2, 31mm (standard), 1/3.1", 1.14µm, AF | |
| Features | LED flash, HDR | |
| Video | 1080p@30fps | |
| Selfie camera | Samsung I9500 Galaxy S4 | Oppo A3s |
| Camera | 2 MP, f/2.4, 31mm (standard) | |
| Features | Dual video call | |
| Video | 1080p@30fps | |
| Connectivity | Samsung I9500 Galaxy S4 | 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 |
| 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 | 4.0, A2DP, EDR, 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 | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| Technology | GSM / HSPA | |
| USB | microUSB 2.0 (MHL 2 TV-out), USB On-The-Go | microUSB 2.0, USB On-The-Go |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot | |
| Camera | Samsung I9500 Galaxy S4 | 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 I9500 Galaxy S4 | Oppo A3s |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | No | FM radio |
| Design | Samsung I9500 Galaxy S4 | Oppo A3s |
| Colors | White Frost, Black Mist, Arctic Blue, Black Edition | Red, Dark Purple |
| Body build | Glass front (Gorilla Glass 3), plastic back, plastic frame | |
| Dimensions | 136.6 x 69.8 x 7.9 mm (5.38 x 2.75 x 0.31 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 130 g (4.59 oz) | 168 g |
| SIM | Micro-SIM | |
| Battery | Samsung I9500 Galaxy S4 | Oppo A3s |
| Type | Li-Ion 2600 mAh, removable | |
| Charging | Qi wireless charging - market dependent | |
| Stand-by | Up to 370 h (3G) | |
| Talk time | Up to 17 h (3G) | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Samsung I9500 Galaxy S4 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
| Features | Samsung I9500 Galaxy S4 | Oppo A3s |
| Sensors | Accelerometer, gyro, proximity, compass, barometer, temperature, humidity, gesture | |
