Nokia C21 Plus vs Microsoft Lumia 640 Dual SIM comparison
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| key specs |
| Display | 6.52-inch | 5.00-inch |
| Processor | Unisoc SC9863A | Qualcomm Snapdragon 400 |
| Front Camera | 5-megapixel | 0.9-megapixel |
| Rear Camera | 13-megapixel + 2-megapixel | 8-megapixel |
| RAM | 2GB, 3GB, 4GB | 1GB |
| Storage | 32GB, 64GB | 8GB |
| Battery Capacity | 4000mAh | 2500mAh |
| OS | Android 11 (Go edition) | Windows Phone 8.1 |
| Resolution | 720x1600 pixels | 720x1280 pixels |
| general |
| Brand | Nokia | Microsoft |
| Model | C21 Plus | Lumia 640 Dual SIM |
| Release date | February 27, 2022 | February 1, 2015 |
| Launched in India | No | - |
| Dimensions (mm) | 165.00 x 75.90 x 8.55 | 141.30 x 72.20 x 8.80 |
| Weight (g) | 178.00 | 145.00 |
| Battery capacity (mAh) | 4000 | 2500 |
| Colours | Dark Cyan, Warm Grey | - |
| Form factor | - | Touchscreen |
| Removable battery | - | Yes |
| display |
| Screen size (inches) | 6.52 | 5.00 |
| Touchscreen | Yes | Yes |
| Resolution | 720x1600 pixels | 720x1280 pixels |
| Aspect ratio | 20:9 | - |
| Pixels per inch (PPI) | - | 294 |
| hardware |
| Processor | octa-core | 1.2GHz quad-core |
| Processor make | Unisoc SC9863A | Qualcomm Snapdragon 400 |
| RAM | 2GB, 3GB, 4GB | 1GB |
| Internal storage | 32GB, 64GB | 8GB |
| Expandable storage | - | Yes |
| Expandable storage type | - | microSD |
| Expandable storage up to (GB) | - | 128 |
| camera |
| Rear camera | 13-megapixel + 2-megapixel | 8-megapixel |
| No. of Rear Cameras | 2 | - |
| Rear autofocus | Yes | - |
| Rear flash | Yes | LED |
| Front camera | 5-megapixel | 0.9-megapixel |
| No. of Front Cameras | 1 | - |
| Front flash | Yes | - |
| software |
| Operating system | Android 11 (Go edition) | Windows Phone 8.1 |
| connectivity |
| Wi-Fi | Yes | Yes |
| Wi-Fi standards supported | 802.11 b/g/n | 802.11 b/g/n |
| GPS | Yes | Yes |
| Bluetooth | Yes, v 4.20 | Yes |
| USB OTG | Yes | No |
| Micro-USB | Yes | - |
| Headphones | 3.5mm | 3.5mm |
| Number of SIMs | 2 | 2 |
| NFC | - | No |
| Infrared | - | No |
| FM | - | Yes |
| Wi-Fi Direct | - | No |
| Mobile High-Definition Link (MHL) | - | No |
| sim 1 |
| SIM Type | Nano-SIM | Micro-SIM |
| GSM/CDMA | GSM | GSM |
| 3G | Yes | Yes |
| 4G/ LTE | Yes | No |
| sim 2 |
| SIM Type | Nano-SIM | Micro-SIM |
| GSM/CDMA | GSM | GSM |
| 3G | Yes | Yes |
| 4G/ LTE | - | No |
| sensors |
| Fingerprint sensor | Yes | - |
| Proximity sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| Ambient light sensor | Yes | Yes |
| Compass/ Magnetometer | - | Yes |
| Gyroscope | - | No |
| Barometer | - | No |
| Temperature sensor | - | No |