| vivo S1 (China) |
Oppo A3s |
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| Hardware and OS | vivo S1 (China) | Oppo A3s |
| Operating system | Android 9.0 (Pie); Funtouch 9 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Mediatek MT6771 Helio P70 (12nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Mali-G72 MP3 | Adreno 506 |
| Internal memory | 128GB 6GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC | microSD, up to 256 GB (dedicated slot) |
| Display | vivo S1 (China) | Oppo A3s |
| Type | IPS LCD capacitive touchscreen, 16M colors | IPS LCD |
| Size | 6.53 inches, 104.7 cm2 | 6.2" inc |
| Resolution | 1080 x 2340 pixels, 19.5:9 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 | vivo S1 (China) | Oppo A3s |
| Camera | 12 MP, f/1.8, 13mm (ultrawide), PDAF 8 MP, f/2.2, (wide) 5 MP, f/2.4, (depth) | |
| Features | LED flash, HDR, panorama | |
| Video | 2160p@30fps, 1080p@30fps | |
| Selfie camera | vivo S1 (China) | Oppo A3s |
| Camera | Motorized pop-up 25 MP, f/2.0 | |
| Features | HDR | |
| Video | 1080p@30fps | |
| Connectivity | vivo S1 (China) | 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 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | 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 | 5.0, A2DP, LE | 4.2, A2DP, LE |
| CDMA | CDMA 800 & TD-SCDMA | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS |
| Technology | GSM / CDMA / HSPA / LTE | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat7 300/50 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 |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Camera | vivo S1 (China) | 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 | vivo S1 (China) | Oppo A3s |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | FM radio | FM radio |
| Design | vivo S1 (China) | Oppo A3s |
| SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Colors | Blue, Pink, Ice black | Red, Dark Purple |
| Dimensions | 162 x 76 x 8.5 mm (6.38 x 2.99 x 0.33 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 189.5 g (6.70 oz) | 168 g |
| Features | vivo S1 (China) | Oppo A3s |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity, compass | |
| Battery | vivo S1 (China) | Oppo A3s |
| Capacity | Non-removable Li-Po 3940 mAh battery | |
| Battery capacity | 4230 mAh, Non-removable Li-Ion | |
| Other | vivo S1 (China) | Oppo A3s |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass |
