| Hardware and OS | Elephone S1 | Oppo A3s |
| Operating system | Android 5.1 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| RAM | RAM: 1GB RAM | |
| GPU | ARM Mali-400 | Adreno 506 |
| Internal Storage | 8GB,TF card up to 64GB (not included) | |
| Internal memory | | 16 GB, 2 GB RAM |
| Memory Card Slot | Dual SIM,Dual Standby | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Display | Elephone S1 | Oppo A3s |
| Type | Capacitive | IPS LCD |
| Size | 5.0 inch | 6.2" inc |
| Resolution | 1280 x 720 (HD 720) | 720 x 1520 px |
| Touchscreen | Multi-touch, 5 points | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Features | High color gamut, Multi-touch, 5 points | |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | 294PPI | 271 PPI |
| Colors | High color gamut | 16M |
| Connectivity | Elephone S1 | Oppo A3s |
| NFC | No | |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | | HSDPA 850 / 900 / 2100 |
| SIM | Micro SIM | |
| 4G Network | | LTE |
| Dual SIM | Dual SIM,dual standby (Micro Nano) | |
| Wi-Fi | 802.11b/g/n wireless internet | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Wireless Charging | 3G,A-GPS,Bluetooth 4.0,GPS,GSM,WiFi | |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | GPS A-GPS | Yes, with A-GPS |
| Speed | | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | Micro 5pin USB | microUSB 2.0, USB On-The-Go |
| Camera | Elephone S1 | Oppo A3s |
| Image | Support | |
| Main camera | Back camera 8.0MP | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | Yes | LED flash, HDR, panorama |
| Video | | 1080p@30fps |
| Selfie camera | Front camera 2.0MP | 8 MP, Single |
| Multimedia | Elephone S1 | Oppo A3s |
| Loudspeaker | Yes | |
| Video Playback | 3GP,H.264,MP4 | |
| Video Out | MP3,WAV | |
| 3.5 mm Jack | yes | Yes |
| Radio | Yes | FM radio |
| Design | Elephone S1 | Oppo A3s |
| Colors | | Red, Dark Purple |
| Dimensions | 13.89 x 6.97 x 0.69 cm | 156.2 x 75.6 x 8.2 mm |
| Weight | 142g | 168 g |
| Battery | Elephone S1 | Oppo A3s |
| Placement | Built-in | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Elephone S1 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | Ambient Light Sensor,Gravity Sensor,Proximity Sensor | Accelerometer, proximity, compass |
