| Hardware and OS | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Operating system | Android 4.4.4 (KitKat), upgradable to 6.0.1 (Marshmallow), TouchWiz UI | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Quad-core 1.4 GHz | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | | Adreno 506 |
| Internal memory | 16GB 1.5GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (dedicated slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Type | Super AMOLED | IPS LCD |
| Size | 4.5 inches, 55.8 cm2 | 6.2" inc |
| Resolution | 720 x 1280 pixels, 16:9 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| 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 S5 mini Duos | Oppo A3s |
| Camera | 8 MP, AF | |
| Features | LED flash, HDR, panorama | |
| Video | 1080p@30fps | |
| Selfie camera | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Camera | 2.1 MP | |
| Video | 1080p@30fps | |
| Connectivity | Samsung Galaxy S5 mini Duos | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | 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 |
| Infrared port | Yes | |
| Network | | GSM / HSPA / LTE |
| NFC | No | |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 4.0, A2DP, EDR, LE, aptX | 4.2, A2DP, LE |
| Technology | GSM / HSPA | |
| Edge | | Yes |
| GPRS | | Yes |
| WLAN | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, hotspot | |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS |
| Speed | HSPA 21.1/5.76 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | microUSB 2.0 | microUSB 2.0, USB On-The-Go |
| Camera | Samsung Galaxy S5 mini Duos | 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 S5 mini Duos | Oppo A3s |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | No | FM radio |
| Design | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Body | IP67 dust/water resistant (up to 1m for 30 mins) | |
| SIM | Dual SIM (Micro-SIM, dual stand-by) | |
| Colors | Charcoal Black, Shimmery White | Red, Dark Purple |
| Dimensions | 131.1 x 64.8 x 9.1 mm (5.16 x 2.55 x 0.36 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 118 g (4.16 oz) | 168 g |
| Features | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Sensors | Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, heart rate | |
| Battery | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Type | Li-Ion 2100 mAh, removable | |
| Talk time | Up to 16 h (3G) | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Samsung Galaxy S5 mini Duos | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
