| Oukitel C21 |
Oppo A3s |
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| Hardware and OS | Oukitel C21 | Oppo A3s |
| Operating system | Android v10 | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | 1.99 GHz, Octa Core Processor | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | MediaTek Helio P60 | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 506 | |
| RAM | 4 GB | |
| Internal memory | 64 GB | 16 GB, 2 GB RAM |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Memory Card Slot | Yes, (Hybrid Slot) | |
| Graphics | Arm Mali-G72 MP3 | |
| Dual Sim | Yes | |
| Sim Size | Nano SIM | |
| Sim Type | Dual Sim, GSM GSM (Hybrid Slot) | |
| Display | Oukitel C21 | Oppo A3s |
| Type | IPS LCD | |
| Size | 6.2" inc | |
| Resolution | 720 x 1520 px | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 81.2% | |
| Screen Size | 6.4 inches, 1080 x 2310 pixels | |
| Display area | 95.9 cm2 | |
| Display Type | Color LTPS (16M) | |
| Display aspect ratio | 19.25 : 9 | 19:9 (height:width) |
| Pixel Density | ~398 PPI | 271 PPI |
| Touch Screen | Yes, with Multitouch | |
| Colors | 16M | |
| Connectivity | Oukitel C21 | 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, v4.2 | 4.2, A2DP, LE |
| Edge | Yes | Yes |
| USB Features | USB on-the-go, USB Charging | |
| GPRS | Yes | Yes |
| VoLTE | Yes | |
| GPS | Yes | Yes, with A-GPS |
| Wifi | Yes, with wifi-hotspot | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps | |
| USB | Yes, USB-C | microUSB 2.0, USB On-The-Go |
| Camera | Oukitel C21 | Oppo A3s |
| Video Recording | 1080p | |
| Main camera | 16 MP f/2 2 MP 2 MP 2 MP with autofocus | 13 MP, Dual |
| Flash | Yes, LED | |
| Specs | 13 MP, f/2.2, AF -2 MP, f/2.4, depth sensor | |
| Features | LED flash, HDR, panorama | |
| Front Video Recording | 1080p | |
| Video | 1080p@30fps | |
| Selfie camera | 20 MP f/2 | 8 MP, Single |
| Multimedia | Oukitel C21 | Oppo A3s |
| Headphone jack | Yes | |
| Yes | ||
| FM Radio | No | |
| 3.5 mm Jack | Yes | |
| Music | MP3,M4A,AAC,MKA,AMR,FLAC,APE,WAV | |
| Radio | FM radio | |
| Video | AVI,MP4,WMV,RMVB,MKV,MOV,ASF | |
| Browser | Yes | |
| Java | No | |
| Design | Oukitel C21 | Oppo A3s |
| Colors | Red, Dark Purple | |
| Dimensions | 157.3 x 75.5 x 8.75 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 170 g | 168 g |
| Battery | Oukitel C21 | Oppo A3s |
| Battery capacity | 4000 mAh | 4230 mAh, Non-removable Li-Ion |
| Type | Non-Removable Battery | |
| Other | Oukitel C21 | Oppo A3s |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass |
