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Realme C21 vs Asus ZenFone C (ZC451CG) comparison

 Compare Realme C21
Realme C21
Compare Asus ZenFone C (ZC451CG)
Asus ZenFone C (ZC451CG)
ratings
Overall NDTV RatingRead ReviewRead Review
Design Rating
Display Rating
Software Rating
Performance Rating
Battery Life Rating
Camera Rating
Value for Money Rating
key specs
Display6.50-inch4.50-inch
ProcessorMediaTek Helio G35Intel Atom Z2520
Front Camera5-megapixel 0.3-megapixel
Rear Camera13-megapixel + 2-megapixel + 2-megapixel 5-megapixel
RAM3GB, 4GB1GB
Storage32GB, 64GB8GB
Battery Capacity5000mAh2100mAh
OSAndroid 10Android 4.4
Resolution720x1600 pixels480x854 pixels
general
BrandRealmeAsus
ModelC21ZenFone C (ZC451CG)
Release dateApril 8, 2021February 1, 2015
Launched in IndiaYes-
Dimensions (mm)165.20 x 76.40 x 8.90136.50 x 67.00 x 10.90
Weight (g)190.00149.00
Battery capacity (mAh)50002100
ColoursCross Black, Cross BlueRed, White, Black
Form factor-Touchscreen
Removable battery-Yes
display
Screen size (inches)6.504.50
TouchscreenYesYes
Resolution720x1600 pixels480x854 pixels
hardware
Processorocta-core1.2GHz dual-core
Processor makeMediaTek Helio G35Intel Atom Z2520
RAM3GB, 4GB1GB
Internal storage32GB, 64GB8GB
Expandable storageYesYes
Expandable storage typemicroSDmicroSD
Expandable storage up to (GB)25632
Dedicated microSD slotYes-
camera
Rear camera13-megapixel (f/2.2) + 2-megapixel (f/2.4) + 2-megapixel (f/2.4)5-megapixel
No. of Rear Cameras3-
Front camera5-megapixel (f/2.2)0.3-megapixel
No. of Front Cameras1-
Rear flash-LED
software
Operating systemAndroid 10Android 4.4
SkinRealme UIZenUI
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 b/g/n802.11 b/g/n
GPSYesNo
BluetoothYes, v 5.00Yes, v 4.00
Micro-USBYes-
Headphones3.5mm3.5mm
Number of SIMs22
NFC-No
Infrared-No
USB OTG-No
FM-Yes
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-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesNo
4G/ LTEYesNo
sensors
Fingerprint sensorYes-
Compass/ MagnetometerYesNo
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
Gyroscope-No
Barometer-No
Temperature sensor-No

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