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Samsung Galaxy S25 Ultra vs Samsung Galaxy S21 Ultra comparison

 Compare Samsung Galaxy S25 Ultra
Samsung Galaxy S25 Ultra
Compare Samsung Galaxy S21 Ultra
Samsung Galaxy S21 Ultra
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-inch6.80-inch
ProcessorSnapdragon 8 EliteSamsung Exynos 2100
Front Camera12-megapixel 40-megapixel
Rear Camera200-megapixel + 50-megapixel + 50-megapixel + 10-megapixel108-megapixel + 12-megapixel + 10-megapixel + 10-megapixel
RAM12GB, 16GB12GB, 16GB
Storage256GB, 512GB, 1TB128GB, 256GB, 512GB
Battery Capacity5000mAh5000mAh
OSAndroid 15Android 11
Resolution1400x3120 pixels1440x3220 pixels
general
BrandSamsungSamsung
ModelGalaxy S25 UltraGalaxy S21 Ultra
Release dateJanuary 22, 2025January 14, 2021
Launched in IndiaYes-
Form factorTouchscreenTouchscreen
Dimensions (mm)162.80 x 77.60 x 8.20165.10 x 75.60 x 8.90
Weight (g)218.00228.00
IP ratingIP68IP68
Battery capacity (mAh)50005000
Removable batteryNo-
Fast charging45W Fast ChargingProprietary
Wireless chargingYesYes
Wireless Charging Type15-
Brand Exclusive FeaturesTitanium frame, Corning Gorilla Armor (Rear and Front Panel)-
Colours-Phantom Titanium, Phantom Navy, Phantom Brown
display
Refresh Rate120 Hz-
Resolution StandardQHD+-
Screen size (inches)6.906.80
TouchscreenYesYes
Resolution1400x3120 pixels1440x3220 pixels
Protection typeGorilla Glass ArmorGorilla Glass
Pixels per inch (PPI)-515
hardware
Processorocta-core2.2GHz octa-core (3x2.8GHz + 4x2.2GHz + 1x2.9GHz)
Processor makeSnapdragon 8 EliteSamsung Exynos 2100
RAM12GB, 16GB12GB, 16GB
Internal storage256GB, 512GB, 1TB128GB, 256GB, 512GB
Expandable storageNo-
Expandable storage typeNo-
Dedicated microSD slotNo-
camera
Rear camera200-megapixel (f/1.7) + 50-megapixel (f/1.9) + 50-megapixel + 10-megapixel108-megapixel (f/1.8, 0.8-micron) + 12-megapixel (f/2.2, 1.4-micron) + 10-megapixel (f/2.4, 1.22-micron) + 10-megapixel (f/4.9, 1.22-micron)
No. of Rear Cameras4-
Rear autofocusYesLaser autofocus
Rear flashYesYes
Front camera12-megapixel (f/2.2)40-megapixel (f/2.2, 0.7-micron)
No. of Front Cameras1-
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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