Realme C21 vs Microsoft Lumia 640 comparison

Compare Realme C21
Compare Microsoft Lumia 640
ratings
Overall NDTV RatingRead Review-
Design Rating-
Display Rating-
Software Rating-
Performance Rating-
Battery Life Rating-
Camera Rating-
Value for Money Rating-
key specs
Display6.50-inch5.00-inch
ProcessorMediaTek Helio G35Qualcomm Snapdragon 400
Front Camera5-megapixel 0.9-megapixel
Rear Camera13-megapixel + 2-megapixel + 2-megapixel 8-megapixel
RAM3GB, 4GB1GB
Storage32GB, 64GB8GB
Battery Capacity5000mAh2500mAh
OSAndroid 10Windows Phone 8.1
Resolution720x1600 pixels720x1280 pixels
general
BrandRealmeMicrosoft
ModelC21Lumia 640
Release dateApril 8, 2021February 1, 2015
Launched in IndiaYes-
Dimensions (mm)165.20 x 76.40 x 8.90141.30 x 72.20 x 8.80
Weight (g)190.00145.00
Battery capacity (mAh)50002500
ColoursCross Black, Cross Blue-
Form factor-Touchscreen
Removable battery-Yes
display
Screen size (inches)6.505.00
TouchscreenYesYes
Resolution720x1600 pixels720x1280 pixels
Pixels per inch (PPI)-294
hardware
Processorocta-core1.2GHz quad-core
Processor makeMediaTek Helio G35Qualcomm Snapdragon 400
RAM3GB, 4GB1GB
Internal storage32GB, 64GB8GB
Expandable storageYesYes
Expandable storage typemicroSDmicroSD
Expandable storage up to (GB)256128
Dedicated microSD slotYes-
camera
Rear camera13-megapixel (f/2.2) + 2-megapixel (f/2.4) + 2-megapixel (f/2.4)8-megapixel
No. of Rear Cameras3-
Front camera5-megapixel (f/2.2)0.9-megapixel
No. of Front Cameras1-
Rear flash-LED
software
Operating systemAndroid 10Windows Phone 8.1
SkinRealme UI-
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 b/g/n802.11 b/g/n
GPSYesYes
BluetoothYes, v 5.00Yes
Micro-USBYes-
Headphones3.5mm3.5mm
Number of SIMs21
NFC-No
Infrared-No
USB OTG-No
FM-No
Wi-Fi Direct-No
Mobile High-Definition Link (MHL)-No
sim 1
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesNo
sim 2
SIM TypeNano-SIM-
GSM/CDMAGSM-
3GYes-
4G/ LTEYes-
sensors
Fingerprint sensorYes-
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
Gyroscope-No
Barometer-No
Temperature sensor-No

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