Samsung Galaxy S25 vs Samsung Galaxy S21 Ultra

ProcessorQualcomm Snapdragon 8 Elite for GalaxySamsung Exynos 2100
Display6.2", FHD+ Dynamic AMOLED 2X, 120 Hz6.8 inches", Dynamic AMOLED 2X, 120 Hz
Camera50MP+10MP+12MP/12MP108MP+10MP+10MP+12MP/MP
Battery4000 mAh5000 mAh
RAM12 GB12 GB
Storage256 GB256 GB
Recommended ForDesign, Performance, Display, Multimedia, Gaming, Software, Build Quality and Main CameraBattery and Software
ColorsIcy Blue, Mint, Navy, Silver Shadow, Blueblack, Coralred, PinkgoldPhantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
LaunchJanuary 22, 2025January 14, 2021
AvailabilityFebruary 07, 2025January 29, 2021
Launch Price₹80,999₹1,05,999
TypeFHD+ Dynamic AMOLED 2XDynamic AMOLED 2X
Refresh Rate120 Hz120 Hz
FeaturesHDR10+HDR10+
Size6.2 inches6.8 inches inches
Resolution Width1080 pixels1440 pixels
Resolution Height2340 pixels3200 pixels
Resolution Ratio19.5:920:9
Pixel Per Inch416 ppi515 ppi
Display ResolutionFHD+FHD+
Peak Brightness2600 nits1500 nits
Weight162 grams227 grams grams
FrontGorilla Glass Victus 2Gorilla Glass Victus
BackGlassGlass
SideAluminium FrameAluminium Frame
Build QualityGorilla Glass Victus 2Corning Gorilla Glass Victus
PortUSB Type-C 3.2USB Type-C 3.2
IP ratingIP68/69 (dust and water resistant)IP68 (dust and water resistant)
SpeakerStereo SpeakersStereo Speakers
Chipset BrandQualcommSamsung
Chipset NameSnapdragon 8 Elite for GalaxyExynos 2100
CPUOcta-coreOcta-core
GPUAdreno 830Mali-G78 MP14
Software NameAndroidAndroid
Software SkinOne UI 7.0One UI 6.1
OS Updates(Years)74
Camera Resolution50 MP108 MP
Camera TypeWide-angle
Camera 2 Resolution10 MP10 MP
Camera 2 TypeTelephotoTelephoto
Camera 3 Resolution12 MP10 MP
Camera 3 TypeUltra-widePeriscope
FeaturesLED Flash, Auto-HDR, PanoramaLED Flash, Auto-HDR, Panorama, Digital Zoom
StabilizationOISOIS
Video8K@24/30fps, 4K@30/60fps, 1080p@30/60/240fps, 10-bit HDR, HDR10+, stereo sound rec., gyro-EIS8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, Stereo sound rec., gyro-EIS
Front Camera Resolution12 MP
Front Camera TypeWideWide
FeaturesHDR, HDR10+, Face UnlockDual Video Call, Auto-HDR, Face Unlock
Video4K@30/60fps, 1080p@30fps4K@30/60fps, 1080p@30fps
Capacity4000 mAh5000 mAh
Battery TypeSilicon CarbonLithium Ion
Charging Speed25 w25 w
Wireless ChargingYesYes
Storage256 GB256 GB
Storage typeUFS 4.1UFS 3.1
RAM12 GB12 GB
RAM typeLPDDR5XLPDDR5
Sim SlotDual SIM (2 nano-SIM and e-SIM, dual stand-by)nano-SIM and eSIM or Dual SIM (2 nano-SIM and eSIM, dual stand-by)
NetworkGSM, CDMA, HSPA, EVDO, LTE, 5GGSM, CDMA, HSPA, EVDO, LTE, 5G
WLANWi-Fi 802.11 a/b/g/n/ac/6eWi-Fi 802.11 a/b/g/n/ac/6e
Bluetooth5.45.2
PositioningGPS, GLONASS, BDS, GALILEOGPS, GLONASS, BDS, GALILEO
NFCYesYes
RadioNoFM Radio
Fingerprint ScannerUltrasonic (under display)Optical (under display)
AI FeaturesCall assist, Chat assist, Interpreter, Note assist, Browsing assist, Photo assistCircle to Search
SensorsAccelerometer, Proximity, Compass, Gyroscope, Barometer, Geomagnetic Sensor, Hall Sensor, Ambient Light SensorAccelerometer, Proximity, Compass, Barometer, Gyroscope, Samsung DeX, Samsung Wireless DeX (desktop experience support), Ultra Wideband (UWB) Support