| Hardware and OS | Xiaomi MI-1S | Oppo A3s |
| Operating system | | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | | Adreno 506 |
| Internal memory | | 16 GB, 2 GB RAM |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Hardware and OS Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| Operating system | Android 4.0 (Ice Cream Sandwich) | |
| Processor | Dual-core 1.7 GHz Scorpion | |
| Chipset | Qualcomm MSM8260 Snapdragon S3 | |
| GPU | Adreno 220 | |
| Internal memory | 4 GB, 1 GB RAM | |
| External memory | microSD, up to 32 GB (dedicated slot) | |
| Display | Xiaomi MI-1S | Oppo A3s |
| Type | | IPS LCD |
| Size | | 6.2" inc |
| Resolution | | 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 |
| Display Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| Type | TFT | |
| Size | 4" inc | |
| Resolution | 480 x 854 px | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 56.0% | |
| Display area | 44.1 cm2 | |
| Display aspect ratio | 16:9 (height:width) | |
| Pixel Density | 245 PPI | |
| Colors | 16M | |
| Connectivity | Xiaomi MI-1S | Oppo A3s |
| 2G Network | | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | | 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 | | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | | Yes, with A-GPS |
| Speed | | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | | microUSB 2.0, USB On-The-Go |
| Connectivity Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | |
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | |
| Network | GSM / HSPA | |
| SIM card | Mini-SIM | |
| Bluetooth | 2.1, A2DP | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA 14.4/5.76 Mbps | |
| USB | microUSB 2.0 | |
| Camera Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| Main camera | 8 MP, Single | |
| Specs | 8 MP, f/2.2, 28mm (wide), AF | |
| Features | LED flash, HDR | |
| Video | 1080p@30fps | |
| Selfie camera | 2 MP, Single | |
| Camera | Xiaomi MI-1S | 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 Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| 3.5 mm Jack | Yes | |
| Radio | No | |
| Multimedia | Xiaomi MI-1S | Oppo A3s |
| 3.5 mm Jack | | Yes |
| Radio | | FM radio |
| Design Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| Colors | White, green, blue, red, violet, orange, gray | |
| Dimensions | 125 x 63 x 11.9 mm | |
| Weight | 149 g | |
| Design | Xiaomi MI-1S | Oppo A3s |
| Colors | | Red, Dark Purple |
| Dimensions | | 156.2 x 75.6 x 8.2 mm |
| Weight | | 168 g |
| Battery Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| Battery capacity | 1930 mAh, Removable Li-Ion | |
| Battery | Xiaomi MI-1S | Oppo A3s |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other Xiaomi MI-1s | Xiaomi MI-1S | Oppo A3s |
| Release date | 2012, August | |
| Sensors | Accelerometer, proximity, compass | |
| Other | Xiaomi MI-1S | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
