Samsung Galaxy S25 Ultra vs Samsung Galaxy S21 comparison

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Compare Samsung Galaxy S25 Ultra
Compare Samsung Galaxy S21
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
Display6.90-inch6.20-inch
ProcessorSnapdragon 8 EliteSamsung Exynos 2100
Front Camera12-megapixel 10-megapixel
Rear Camera200-megapixel + 50-megapixel + 50-megapixel + 10-megapixel12-megapixel + 12-megapixel + 64-megapixel
RAM12GB8GB
Storage256GB, 512GB, 1TB128GB, 256GB
Battery Capacity5000mAh4000mAh
OSAndroid 15Android 11
Resolution1400x3120 pixels1080x2400 pixels
general
BrandSamsungSamsung
ModelGalaxy S25 UltraGalaxy S21
Release dateJanuary 22, 2025January 14, 2021
Launched in IndiaYes-
Form factorTouchscreenTouchscreen
Dimensions (mm)162.80 x 77.60 x 8.20151.70 x 71.20 x 7.90
Weight (g)218.00171.00
IP ratingIP68IP68
Battery capacity (mAh)50004000
Removable batteryNo-
Fast charging45W Fast ChargingProprietary
Wireless chargingYesYes
Wireless Charging Type15-
Brand Exclusive FeaturesTitanium frame, Corning Gorilla Armor (Rear and Front Panel)-
Colours-Phantom Violet
display
Refresh Rate120 Hz-
Resolution StandardQHD+-
Screen size (inches)6.906.20
TouchscreenYesYes
Resolution1400x3120 pixels1080x2400 pixels
Protection typeGorilla Glass ArmorGorilla Glass
Aspect ratio-20:9
Pixels per inch (PPI)-421
hardware
Processorocta-core2.2GHz octa-core (3x2.8GHz + 4x2.2GHz + 1x2.9GHz)
Processor makeSnapdragon 8 EliteSamsung Exynos 2100
RAM12GB8GB
Internal storage256GB, 512GB, 1TB128GB, 256GB
Expandable storageNo-
Expandable storage typeNo-
Dedicated microSD slotNo-
camera
Rear camera200-megapixel (f/1.7) + 50-megapixel (f/1.9) + 50-megapixel + 10-megapixel12-megapixel (f/1.8, 1.8-micron) + 12-megapixel (f/2.2, 1.4-micron) + 64-megapixel (f/2.0, 0.8-micron)
No. of Rear Cameras43
Rear autofocusYesYes
Rear flashYesYes
Front camera12-megapixel (f/2.2)10-megapixel (f/2.2, 1.22-micron)
No. of Front Cameras11
Front autofocusYes-
Lens Type (Second Rear Camera)Ultra Wide-Angle-
Lens Type (Third Rear Camera)Telephoto-
Lens Type (Fourth Rear Camera)Telephoto-
software
Operating systemAndroid 15Android 11
SkinOne UI 7One UI 3.1
connectivity
Wi-Fi 7Yes-
Wi-FiYesYes
Wi-Fi standards supported802.11 a/b/g/n/ac/ax802.11 a/b/g/n/ac/ax
GPSYesYes
BluetoothYes, v 5.30Yes, v 5.00
NFCYesYes
USB Type-CYesYes
Number of SIMs22
Wi-Fi DirectYes-
Active 4G on both SIM cardsYes-
sim 1
SIM TypeNano-SIMNano-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
5GYesYes
sim 2
SIM TypeNano-SIMNano-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
5GYesYes
sensors
Fingerprint sensorYes-
In-Display Fingerprint SensorYesYes
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
GyroscopeYesYes
BarometerYesYes
Face unlock-Yes
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