| Hardware and OS | vivo Y55L | 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 (vivo 1603) | vivo Y55L | Oppo A3s |
| Operating system | Android 6 (Marshmallow); Funtouch 2.6 | |
| Processor | Octa-core 1.4 GHz Cortex-A53 | |
| Chipset | Qualcomm MSM8937 Snapdragon 430 (28 nm) | |
| Internal memory | 16GB 2GB RAM | |
| External memory | microSDXC (dedicated slot) | |
| GPU | Adreno 505 | |
| Display | vivo Y55L | 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 (vivo 1603) | vivo Y55L | Oppo A3s |
| Size | 5.2 inches, 74.5 cm2 | |
| Resolution | 720 x 1280 pixels, 16:9 ratio | |
| Type | IPS LCD capacitive touchscreen, 16M colors | |
| Main Camera (vivo 1603) | vivo Y55L | Oppo A3s |
| Camera | 8 MP, AF | |
| Features | LED flash, HDR, panorama | |
| Video | 1080p@30fps | |
| Selfie camera (vivo 1603) | vivo Y55L | Oppo A3s |
| Camera | 5 MP | |
| Connectivity | vivo Y55L | 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 (vivo 1603) | vivo Y55L | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 2100 | |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 40(2300) | |
| Bluetooth | 4.2, A2DP, LE | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | |
| Technology | GSM / HSPA / LTE | |
| USB | microUSB 2.0, USB On-The-Go | |
| WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | |
| Multimedia (vivo 1603) | vivo Y55L | Oppo A3s |
| 3.5 mm Jack | Yes | |
| Loudspeaker | Yes | |
| Radio | No | |
| Camera | vivo Y55L | 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 |
| Battery (vivo 1603) | vivo Y55L | Oppo A3s |
| Capacity | Non-removable Li-Ion 2650 mAh battery | |
| Design (vivo 1603) | vivo Y55L | Oppo A3s |
| Colors | Gold, Gray | |
| Dimensions | 147.9 x 72.9 x 7.5 mm (5.82 x 2.87 x 0.30 in) | |
| Weight | 142 g (5.01 oz) | |
| SIM | Dual SIM (Micro-SIM, dual stand-by) | |
| Multimedia | vivo Y55L | Oppo A3s |
| 3.5 mm Jack | | Yes |
| Radio | | FM radio |
| Features (vivo 1603) | vivo Y55L | Oppo A3s |
| Sensors | Accelerometer, proximity | |
| Design | vivo Y55L | Oppo A3s |
| Colors | | Red, Dark Purple |
| Dimensions | | 156.2 x 75.6 x 8.2 mm |
| Weight | | 168 g |
| Battery | vivo Y55L | Oppo A3s |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | vivo Y55L | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
