Samsung Galaxy S25 vs Samsung Galaxy A21s

Compared 2 smartphones : Samsung Galaxy S25 Manufactured in February, 2025, with display 6.2 with chipsetQualcomm Snapdragon 8 Elite, vs Samsung Galaxy A21s, Manufactured in June, 2020 with chipsetSamsung Exynos 850. Below are specs, tests, pros and cons for each device

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy S25
  • Higher pixel density: 416ppi
  • Higher refresh rate: 120Hz
  • Lighter design: 162g vs 192g
  • Newer Bluetooth version: 5.4 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Built-in eSIM
Reasons to choose Samsung Galaxy A21s
  • Larger display: 6.5in
  • Higher battery capacity: 5000mAh vs 4000mAh

Versions

Available versions and configurations
Memory Options - 12/128 GB
- 12/256 GB
- 12/512 GB
- 2/32 GB
- 3/32 GB
- 3/64 GB
- 3/128 GB
- 4/32 GB
- 4/64 GB
- 4/128 GB
- 6/64 GB
- 6/128 GB

Review

Key Specs Samsung Galaxy S25 and Samsung Galaxy A21s
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison

Display

Display quality comparison
Type Dynamic AMOLED PLS TFT
Size 6.2 in 6.5 in
Resolution 1080x2340 pixels 720x1600 pixels
Aspect ratio 19.5:9 20:9
Pixel density 416 ppi 270 ppi
Refresh rate 120 Hz 60 Hz
Adaptive refresh rate Yes (1-120 Hz) No
Max brightness 2600 nits 540 nits
HDR support Yes HDR10+ No
Touch Sampling Rate 240 Hz n/a
Screen-to-body ratio 91.1 % 82.9 %
Features - DCI-P3
- Always-On Display
n/a
Display test
Peak brightness (auto)
Samsung Galaxy S25
1406 nits
Samsung Galaxy A21s
487 nits
sRGB gamut97.4 %88.4 %
PWM (Flicker)240 Hz500 Hz
Response time2 ms30.4 ms
Contrast∞ Infinite1500:1

Design & Build

Design and ergonomics comparison
Height 146.9 mm (5.78 in) 163.6 mm (6.44 in)
Width 70.5 mm (2.78 in) 75.3 mm (2.96 in)
Thickness 7.2 mm (0.28 in) 8.9 mm (0.35 in)
Weight 162 g (5.71 oz) 192 g (6.77 oz)
Water resistance IP68 No
Cooling system Vapor chamber n/a
Back panel Glass Plastic
Frame Metal Plastic
Colors - Black
- Silver
- Gray
- Blue
- Green
- Pink
- Black
- Blue
- Red
Fingerprint sensor Yes In-Display Yes rear
Screen-to-body ratio
Samsung Galaxy S25
91.1 %
Samsung Galaxy A21s
82.9 %

Performance

Testing Samsung Galaxy S25 and Samsung Galaxy A21s In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite Samsung Exynos 850
Max Frequency 4470 MHz 2000 MHz
CPU Cores 8 (2 + 6) 8 (8)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))
8/2 (Cortex-A55)
Process TSMC Samsung
Transistor Size 3 nm 8 nm
Neural Processor Hexagon No
Graphics Adreno 830 Mali-G52 MP1
GPU Cores 1536 24
GPU Frequency 1100 MHz 850 MHz
FLOPS 3379.2 GFLOPS 40.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S25
3075
Samsung Galaxy A21s
484
Geekbench 6 (Multi-Core)
Samsung Galaxy S25
9822
Samsung Galaxy A21s
1523
Geekbench 6 (Single-Core)3075484
Geekbench 6 (Multi-Core)98221523
Geekbench Compute (GPU)26264n/a
AnTuTu 10
AnTuTu 10
Samsung Galaxy S25
2382973
Samsung Galaxy A21s
191375
CPU58013968748
GPU96129926807
Memory47874159210
UX36279436610
NanoReview Score2382973191375
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S25
n/a
Samsung Galaxy A21s
425
Max Surface Temp.n/a43.2 °C
Stabilityn/a98 %
Graphics Testn/a2 fps
Graphics Scoren/a425
PCMark 3.0
PCMark 3.0
Samsung Galaxy S25
n/a
Samsung Galaxy A21s
5429
Writing scoren/a5426
Web scoren/a4708
Video editingn/a5145
Data manipulationn/a3808
NanoReview Scoren/a5429

Memory

RAM
RAM Size 12 GB - 3 GB
- 4 GB
Memory Type LPDDR5X LPDDR4X
Memory Frequency 5333 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity128 GB- 32 GB
- 64 GB
Storage TypeUFS 4.0eMMC 5.1
Memory CardNoMicroSD

Software

OS Android 15 Android 10 (Upgradeable to Android 12)
OS Size 30.1 GB 12 GB
UI Skin One UI 7.0 One UI 4.1

Battery

Volume 4000 mAh 5000 mAh
Max Charging Power 25 W 15 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (56% in 30 min) Yes (50% in 60 min)
Full Charge Time 1:17 h 2:10 h
Battery Life Test
Battery Life
Samsung Galaxy S25
24:10
Samsung Galaxy A21s
25:00
Web Browsing09:09 h09:45 h
Video Playback17:15 h14:13 h
Games05:32 h05:34 h
Standby Mode108 h128 h

Main camera

Matrix 50 MP 48 MP
Photo resolution 8160x6120 pixels 8000x6000 pixels
Zoom Optical, 3x Digital
Flash LED LED
Stabilization Optical Digital
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 60 fps) No
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 240 fps (1080p) No
Wide-angle lens 120 ° 123 °
Lenses count Standard: 50 MP
Telephoto: 10 MP
Ultra-wide: 12 MP
Standard: 48 MP
Ultra-wide: 8 MP
Macro: 2 MP
Depth: 2 MP
Features - Bokeh effect
- Pro mode
- RAW support
Bokeh effect
Main lens
Matrix50 MP48 MP
Aperturef/1.8f/2.0
Focal length24 mm26 mm
SensorSamsung ISOCELL S5KGN3Samsung S5KGM2
Sensor size1/1.561/2.0
Pixel size1 μm0.8 μm
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Telephoto
Matrix10 MPn/a
Aperturef/2.4n/a
Focal length67 mmn/a
SensorSamsung ISOCELL S5K3K1n/a
Sensor size1/3.94n/a
Pixel size1 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix12 MP8 MP
Aperturef/2.2f/2.2
Focal length13 mmn/a
SensorSony IMX564n/a
Sensor size1/2.551/4.0
Pixel size1.4 μm1.12 μm
StabilizationDigitalDigital

Front camera

Matrix 12 MP 13 MP
Photo resolution 4000x3000 pixels 4128x3096 pixels
Aperture f/2.2 f/2.2
Focal length 26 mm n/a
Sensor Samsung S5K3LU CMOS
Sensor size 1/3.2 1/3.1
Pixel size 1.12 μm 1.12 μm
Autofocus Phase autofocus No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.4 5
Bluetooth features LE PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- OTG
- Charging
- USB Storage Mode
- OTG
DisplayPort Yes DP 1.2 n/a
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port No No
Connectivity
SIM Count*12
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM850,GSM900,DCS1800,PCS1900GSM850, GSM900, DCS1800, PCS1900
3G BandsUMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900)B1 (2100), B2 (1900), B5(850), B8 (900)
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B29/B30/B66/B71)LTE (B1/B2/B3/B5/B7/B8/B20/B28)
LTE categoryn/a13
5G SupportYesNo

Sound

Speakers n/a Mono
3.5 mm Jack No Yes
FM Radio No Yes
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy S25
91.7 dB
Samsung Galaxy A21s
79.5 dB

Other

Class Flagship Budget
Announced January, 2025 yr May, 2020 yr
Release Date February, 2025 yr June, 2020 yr
Launch Price ($) n/a 200
MSRP ($) 799 n/a
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
- Hall Sensor
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a

Note

Samsung Galaxy S25:

Supports up to 2 eSIMs. The international model has 2 physical SIM slots, while the U.S. model has 1.

* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy S25 the clear winner in this comparison.

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