On this page we compare specs vivo V21s Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) with Oppo A3s Octa-core 1.8 GHz Cortex-A53, we compare external dimensions, compare screens and performance, the amount of RAM and memory for storing media data, battery capacity and characteristics of photo cameras, compare the presence of various sensors and functions.
| Hardware and OS | vivo V21s | Oppo A3s |
|---|
| Operating system | Android 12, Funtouch 12 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | MediaTek MT6853 Dimensity 800U (7 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Mali-G57 MC3 | Adreno 506 |
| Internal memory | 128GB 8GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (uses shared SIM slot) | microSD, up to 256 GB (dedicated slot) |
| Display | vivo V21s | Oppo A3s |
|---|
| Type | AMOLED, 90Hz, HDR10 , 500 nits (typ), 800 nits (HBM) | IPS LCD |
| Size | 6.44 inches, 100.0 cm2(~84.7% screen-to-body ratio) | 6.2" inc |
| Resolution | 1080 x 2404 pixels, 20:9 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 |
| Connectivity | vivo V21s | Oppo A3s |
|---|
| 5G Network | 1, 3, 7, 8, 28, 40, 41, 78 SA/NSA | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| NFC | Yes | |
| 3G Network | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 66 | LTE |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Technology | GSM / HSPA / LTE / 5G | |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 5.1, A2DP, LE | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | | Yes, with A-GPS |
| Speed | HSPA, LTE-A, 5G | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | USB Type-C 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| Main Camera | vivo V21s | Oppo A3s |
|---|
| Features | LED flash, HDR, panorama | |
| Video | 4K@30fps, 1080p@30/60fps | |
| Selfie camera | vivo V21s | Oppo A3s |
|---|
| Camera | 44 MP, f/2.0, (wide), AF, OIS | |
| Features | Dual-LED flash, HDR | |
| Video | 4K@30fps, 1080p@30fps | |
| Camera | vivo V21s | 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 V21s | Oppo A3s |
|---|
| Loudspeaker | Yes | |
| 3.5 mm Jack | No | Yes |
| Radio | | FM radio |
| Design | vivo V21s | Oppo A3s |
|---|
| SIM | Hybrid Dual SIM (Nano-SIM, dual stand-by) | |
| Colors | Dusk Blue, Gradient | Red, Dark Purple |
| Dimensions | 159.7 x 73.9 x 7.3 mm or 7.4 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 176 g / 177 g (6.21 oz) | 168 g |
| Features | vivo V21s | Oppo A3s |
|---|
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | |
| Battery | vivo V21s | Oppo A3s |
|---|
| Type | Li-Po 4000 mAh, non-removable | |
| Charging | 33W wired, 63% in 30 min (advertised) | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | vivo V21s | Oppo A3s |
|---|
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
