Itel itel S25 Ultra vs Samsung Galaxy S21 Plus

Compared 2 smartphones : Itel itel S25 Ultra Manufactured in November, 2024, with display 6.78 with chipsetUnisoc T620, vs Samsung Galaxy S21 Plus, Manufactured in February, 2021 with chipsetSamsung Exynos 2100. Below are specs, tests, pros and cons for each device

Key Differences

Device key advantages
Reasons to choose Itel itel S25 Ultra
  • Larger display: 6.78in
  • Lighter design: 163g vs 200g
  • Higher battery capacity: 5000mAh vs 4800mAh
  • Infrared port
  • Includes charger
Reasons to choose Samsung Galaxy S21 Plus
  • Higher pixel density: 394ppi
  • Supports newer USB: 3.2 vs 2
  • Supports Dolby Atmos
  • Built-in eSIM

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 8/256 GB
- 8/512 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Itel itel S25 Ultra and Samsung Galaxy S21 Plus
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.
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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 AMOLED Dynamic AMOLED
Size 6.78 in 6.7 in
Resolution 1080x2436 pixels 1080x2400 pixels
Aspect ratio 20.5:9 20:9
Pixel density 393 ppi 394 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes Yes (48-120 Hz)
Max brightness 1400 nits 1300 nits
HDR support No Yes HDR10+
Screen-to-body ratio 89.1 % 88.7 %
Features - DCI-P3
- Always-On Display
- DCI-P3
- Always-On Display
Display test
Peak brightness (auto)
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
879 nits
sRGB gamutn/a98.9 %
PWM (Flicker)n/a240 Hz
Response timen/a6.2 ms
Contrastn/a∞ Infinite

Design & Build

Design and ergonomics comparison
Height 164.2 mm (6.46 in) 161.5 mm (6.36 in)
Width 74.6 mm (2.94 in) 75.6 mm (2.98 in)
Thickness 6.9 mm (0.27 in) 7.8 mm (0.31 in)
Weight 163 g (5.75 oz) 200 g (7.05 oz)
Water resistance IP64 IP68
Back panel Plastic Glass
Frame Plastic Metal
Colors - Black
- Gray
- Purple
- Black
- Silver
- Gold
- Red
- Purple
Fingerprint sensor Yes In-Display Yes In-Display
Screen-to-body ratio
Itel itel S25 Ultra
89.1 %
Samsung Galaxy S21 Plus
88.7 %

Performance

Testing Itel itel S25 Ultra and Samsung Galaxy S21 Plus In benchmarks
Processor
Chipset Unisoc T620 Samsung Exynos 2100
Max Frequency 2200 MHz 2840 MHz
CPU Cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6/1.8 (Cortex-A55)
- 2/2.2 (Cortex-A75)
- 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)
Process TSMC Samsung
Transistor Size 12 nm 5 nm
Neural Processor No Yes
Graphics Mali-G57 MP1 Mali-G78 MP14
GPU Cores 32 896
GPU Frequency 850 MHz 854 MHz
FLOPS 54.4 GFLOPS 1530.4 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Itel itel S25 Ultra
497
Samsung Galaxy S21 Plus
1428
Geekbench 6 (Multi-Core)
Itel itel S25 Ultra
1541
Samsung Galaxy S21 Plus
3840
Geekbench 6 (Single-Core)4971428
Geekbench 6 (Multi-Core)15413840
Geekbench Compute (GPU)599n/a
AnTuTu 10
AnTuTu 10
Itel itel S25 Ultra
332915
Samsung Galaxy S21 Plus
919348
CPU101047262973
GPU30281294382
Memory116778147307
UX84809214686
NanoReview Score332915919348
3DMark Wild Life
3DMark Wild Life
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
5538
Max Surface Temp.n/a41.5 °C
Stabilityn/a67 %
Graphics Testn/a33 fps
Graphics Scoren/a5538

Memory

RAM
RAM Size 8 GB 8 GB
Memory Type LPDDR4X LPDDR5
Memory Frequency 2133 MHz 2750 MHz
Channels 2 2
Storage
Storage Capacity- 128 GB
- 256 GB
- 512 GB
- 128 GB
- 256 GB
Storage TypeUFS 2.2UFS 3.1
Memory Cardn/aNo

Software

OS Android 14 Android 11 (Upgradeable to Android 14)
OS Size n/a 27.2 GB
UI Skin itel OS 14.5 One UI 6

Battery

Volume 5000 mAh 4800 mAh
Max Charging Power 18 W 25 W
Battery Type Li-Po Li-ion
Removable No No
Wireless Charging No Yes (15 W)
Reverse Charging No Yes (Wireless)
Fast Charging Yes Yes (54% in 30 min)
Full Charge Time n/a 1:12 h
Battery Life Test
Battery Life
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
20:53
Web Browsingn/a07:28 h
Video Playbackn/a13:15 h
Gamesn/a05:04 h
Standby Moden/a105 h

Main camera

Matrix 50 MP 12 MP
Photo resolution n/a 4000x3000 pixels
Zoom Digital Optical, 1.1x
Flash LED Dual LED
Stabilization Digital Optical
8K Recording No Up to 24FPS
4K Recording No Yes (Up to 60 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
Slow Motion n/a 960 fps (720p)
Wide-angle lens n/a 120 °
Lenses count Standard: 50 MP
Macro
Depth
Standard: 12 MP
Telephoto: 64 MP
Ultra-wide: 12 MP
Features - Bokeh effect
- Pro mode
- Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP12 MP
Aperturef/1.6f/1.8
Focal lengthn/a26 mm
Sensorn/aSony IMX555
Sensor sizen/a1/1.76
Pixel sizen/a1.8 μm
AutofocusPhase autofocusPhase autofocus (Dual Pixel)
StabilizationDigitalOptical
Telephoto
Matrixn/a64 MP
Aperturen/af/2.0
Focal lengthn/a28 mm
Sensorn/aSamsung Bright S5KGW2
Sensor sizen/a1/1.72
Pixel sizen/a0.8 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrixn/a12 MP
Aperturen/af/2.2
Focal lengthn/a13 mm
Sensorn/aSony IMX563
Sensor sizen/a1/2.55
Pixel sizen/a1.4 μm
Stabilizationn/aDigital
Main camera DxOMark results
Photo quality
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
129
Video quality
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
137
Overall camera score
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
133
Bokehn/a70
Previewn/a72
Zoomn/a126

Front camera

Matrix 32 MP 10 MP
Photo resolution n/a 3872x2592 pixels
Aperture f/2.2 f/2.2
Focal length 22 mm 26 mm
Sensor n/a Sony IMX374
Sensor size n/a 1/3.24
Pixel size n/a 1.22 μm
Autofocus No Phase autofocus (Dual Pixel)
Stabilization Digital Digital
Video resolution 1080p (Full HD) at 30 fps 2160p (4K) at 60 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features LE LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 3.2
USB features - Charging
- USB Storage Mode
- OTG
- Charging
- USB Storage Mode
- USB-Host mode
- OTG
DisplayPort No n/a
GPS - GPS
- GLONASS
- Beidou
- Galileo
- GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Yes
Infrared Port Yes No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoYes
Hybrid SlotNoNo
2G Bandsn/aGSM 850, 900, 1800, 1900 MHz
3G Bandsn/aWCDMA Band 1, 2, 4, 5, 8
LTE Bands*n/aLTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66)
LTE categoryn/a24
5G SupportNoYes

Sound

Speakers Mono Stereo
3.5 mm Jack No No
FM Radio No No
Dolby Atmos No Yes
Speaker Test
Max Volume
Itel itel S25 Ultra
n/a
Samsung Galaxy S21 Plus
87.8 dB

Other

Class Budget Flagship
Announced November, 2024 yr January, 2021 yr
Release Date November, 2024 yr February, 2021 yr
Launch Price ($) 140 1000
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
- Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes 18 W n/a
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy S21 Plus the clear winner in this comparison.

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