| ZTE V857 |
Oppo A3s |
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| Hardware and OS | ZTE V857 | Oppo A3s |
| Operating system | Android 2.3 Gingerbread | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | MediaTek MT6573 Processor clock: 650 MHz Number of cores: 1 GPU: PowerVR SGX531 | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm SDM450 Snapdragon 450 (14 nm) | |
| RAM memory | 256 MB | |
| GPU | Adreno 506 | |
| Internal memory | 512 MB | 16 GB, 2 GB RAM |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Display | ZTE V857 | Oppo A3s |
| Display | Color / TFT 256k colors 240 x 320 px (2.80") 143 ppi ~41.1% screen-to-body ratio | |
| Type | IPS LCD | |
| Size | 6.2" inc | |
| Resolution | 720 x 1520 px | |
| Touchscreen | yes | 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 | |
| Connectivity | ZTE V857 | Oppo A3s |
| NFC | yes | |
| WiFi | yes v802.11 b/g/n | |
| Hotspot WiFi | yes | |
| DLNA | yes | |
| IrDA | yes | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 2100 | |
| WAP | yes v2.0 | |
| 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 | yes v2.1 | 4.2, A2DP, LE |
| Edge | yes | Yes |
| GPRS | yes | Yes |
| GPS | yes | Yes, with A-GPS |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps | |
| USB | yes v2.0 | microUSB 2.0, USB On-The-Go |
| Camera | ZTE V857 | Oppo A3s |
| Image Resolution | 1600x1200 px | |
| Flash | yes | |
| Digital zoom | yes | |
| Video formats | MPEG4, H.263, H.264 | |
| Main camera | 2 Mpx | 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 | ZTE V857 | Oppo A3s |
| 3.5 mm Jack | Yes | |
| Radio | yes | FM radio |
| Design | ZTE V857 | Oppo A3s |
| Colors | Red, Dark Purple | |
| Dimensions | 104.00 x 56.80 x 13.00 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 105.00 g | 168 g |
| Battery | ZTE V857 | Oppo A3s |
| Wireless battery charging | yes | |
| Battery capacity | 4230 mAh, Non-removable Li-Ion | |
| Other | ZTE V857 | Oppo A3s |
| Accelerometer | yes | |
| Altimeter | yes | |
| Barometer | yes | |
| Fingerprint scanner | yes | |
| Gravity | yes | |
| Gyroscope | yes | |
| Hall-effect | yes | |
| Hygrometer | yes | |
| Iris scanner | yes | |
| Magnetometer | yes | |
| Proximity | yes | |
| Thermometer | yes | |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass |
