| Xiaomi Mi 9S |
Oppo A3s |
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| Hardware and OS | Xiaomi Mi 9S | Oppo A3s |
| Operating system | Android v9.0 (Pie) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | 2.96 GHz, Octa Core Processor | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm Snapdragon 855 | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 506 | |
| Cores | 2.96 GHz, Single core, Kryo 485 2.42 GHz, Tri core, Kryo 485 1.8 GHz, Quad core, Kryo 485 | |
| Internal memory | 128 GB | 16 GB, 2 GB RAM |
| RAM | 6 GB | |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Memory Card Slot | No | |
| Graphics | Adreno 640 | |
| Dual Sim | Yes | |
| Sim Size | Nano Nano SIM | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | Xiaomi Mi 9S | Oppo A3s |
| Type | IPS LCD | |
| Size | 6.2" inc | |
| Resolution | 720 x 1520 px | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | ~ 86.48% | 81.2% |
| Display area | 95.9 cm2 | |
| Screen Size | 6.39 inches, 1080 x 2280 pixels | |
| Display aspect ratio | 19:9 | 19:9 (height:width) |
| Display Type | Color Super AMOLED screen (16M) | |
| Pixel Density | ~395 PPI | 271 PPI |
| Colors | 16M | |
| Touch Screen | Yes, with Multitouch | |
| Connectivity | Xiaomi Mi 9S | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | Yes | HSDPA 850 / 900 / 2100 |
| 4G Network | Yes | 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 | Yes, v5.0 | 4.2, A2DP, LE |
| Edge | Yes | Yes |
| GPRS | Yes | Yes |
| GPS | yes with A-GPS, Glonass | Yes, with A-GPS |
| USB Features | USB Charging | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps | |
| VoLTE | Yes | |
| USB | Yes, USB-C | microUSB 2.0, USB On-The-Go |
| Wifi | Yes, with wifi-hotspot | |
| Camera | Xiaomi Mi 9S | Oppo A3s |
| Main camera | 48 MP Wide Angle, Ultra-Wide Angle Camera(3" sensor size, 1µm pixel size) f/1.75-f/2.2 8 MP 2 MP with autofocus | 13 MP, Dual |
| Specs | 13 MP, f/2.2, AF -2 MP, f/2.4, depth sensor | |
| Video Recording | 1080p @ 30fps FHD | |
| Features | igital Zoom, Auto Flash, Face detection, Touch to focus | LED flash, HDR, panorama |
| Flash | Yes, LED | |
| Video | 1080p@30fps | |
| Selfie camera | 20 MP f/2 | 8 MP, Single |
| Front Video Recording | 1080p @ 30fps FHD | |
| Multimedia | Xiaomi Mi 9S | Oppo A3s |
| 3.5 mm Jack | Yes | |
| Headphone jack | Yes | |
| Radio | FM radio | |
| Yes | ||
| FM Radio | Yes | |
| Music | Yes | |
| Video | Yes | |
| Browser | Yes, supports HTML5 | |
| Java | No | |
| Design | Xiaomi Mi 9S | Oppo A3s |
| Colors | Red, Dark Purple | |
| Dimensions | 157.2 x 74.6 x 8.9 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 196 g | 168 g |
| Battery | Xiaomi Mi 9S | Oppo A3s |
| Battery capacity | 4000 mAh, Li-ion Battery | 4230 mAh, Non-removable Li-Ion |
| Type | Non-Removable Battery | |
| Fast Charging | Yes | |
| Other | Xiaomi Mi 9S | Oppo A3s |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass |
