Home Phone comparison Samsung Galaxy S25 Ultra and Xiaomi Redmi 15C 4G - Which is better?

Samsung Galaxy S25 Ultra vs Xiaomi Redmi 15C 4G

94 out 100
Samsung Galaxy S25 Ultra
VS
56 out 100
Xiaomi Redmi 15C 4G
Samsung Galaxy S25 Ultra
Xiaomi Redmi 15C 4G

Compared 2 smartphones : Samsung Galaxy S25 Ultra Manufactured in February, 2025, with display 6.9 with chipsetQualcomm Snapdragon 8 Elite, vs Xiaomi Redmi 15C 4G, Manufactured in August, 2025with chipsetMediaTek Helio G81 Ultra. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy S25 Ultra
  • Higher pixel density: 498ppi
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Xiaomi Redmi 15C 4G
  • Lighter design: 205g vs 218g
  • Higher battery capacity: 6000mAh vs 5000mAh

Versions

Available versions and configurations
Memory Options - 12/256 GB
- 12/512 GB
- 12/1024 GB
- 16/1024 GB		 - 4/128 GB
- 4/256 GB

Review

Key Specs Samsung Galaxy S25 Ultra and Xiaomi Redmi 15C 4G
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
Smartphones:
Galaxy S25 Ultra
vs
Xiaomi Redmi 15C 4G

Display

Display quality comparison
Type Dynamic AMOLED IPS LCD
Size 6.9 in 6.9 in
Resolution 1440x3120 pixels 720x1600 pixels
Aspect ratio 19.5:9 20:9
Pixel density 498 ppi 254 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (1-120 Hz) Yes (60-120 Hz)
Max brightness 2600 nits n/a
HDR support Yes HDR10+ No
Touch Sampling Rate 240 Hz n/a
Screen-to-body ratio 92.4 % 84.2 %
Features - DCI-P3
- Always-On Display
- DC dimming		 n/a
Display test
Peak brightness (auto)
Samsung Galaxy S25 Ultra
1403 nits
Xiaomi Redmi 15C 4G
n/a
sRGB gamut97.7 %n/a
PWM (Flicker)240 Hzn/a
Response time1 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S25 Ultra]

Design & Build

Design and ergonomics comparison
Height 162.8 mm (6.41 in) 171.6 mm (6.76 in)
Width 77.6 mm (3.06 in) 79.5 mm (3.13 in)
Thickness 8.2 mm (0.32 in) 8 mm (0.31 in)
Weight 218 g (7.69 oz) 205 g (7.23 oz)
Water resistance IP68 IP64
Cooling system Vapor chamber n/a
Back panel Glass Eco Leather
Frame Metal Plastic
Colors - Black
- Silver
- Gray
- Blue		 - Gray
- Blue
- Green
- Orange
Fingerprint sensor Yes In-Display Yes, In-Button
Screen-to-body ratio
Samsung Galaxy S25 Ultra
92.4 %
Xiaomi Redmi 15C 4G
84.2 %

Performance

Testing Samsung Galaxy S25 Ultra and Xiaomi Redmi 15C 4G In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite MediaTek Helio G81 Ultra
Max Frequency 4470 MHz 2000 MHz
CPU Cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 6/1.7 (Cortex-A55)
- 2/2 (Cortex-A75)
Process TSMC TSMC
Transistor Size 3 nm 12 nm
Neural Processor Hexagon Yes
Graphics Adreno 830 Mali-G52 MP2
GPU Cores 1536 48
GPU Frequency 1100 MHz 820 MHz
FLOPS 3379.2 GFLOPS 78.7 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S25 Ultra
3147
Xiaomi Redmi 15C 4G
421
Geekbench 6 (Multi-Core)
Samsung Galaxy S25 Ultra
9750
Xiaomi Redmi 15C 4G
1387
Geekbench 6 (Single-Core)3147421
Geekbench 6 (Multi-Core)97501387
Geekbench Compute (GPU)25681n/a
Sources: Geekbench v6 [Samsung Galaxy S25 Ultra]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S25 Ultra
2795139
Xiaomi Redmi 15C 4G
278312
CPU65987184872
GPU129416735457
Memory47131974922
UX36978283061
NanoReview Score2795139278312

Memory

RAM
RAM Size - 12 GB
- 16 GB		 4 GB
Memory Type LPDDR5X LPDDR4X
Memory Frequency 5333 MHz 1800 MHz
Channels 2 2
Storage
Storage Capacity- 256 GB
- 512 GB
- 1024 GB		128 GB
Storage TypeUFS 4.0eMMC 5.1
Memory CardNoMicroSD

Software

OS Android 15 Android 15
OS Size 30.4 GB n/a
UI Skin One UI 7.0 HyperOS 2.0

Battery

Volume 5000 mAh 6000 mAh
Max Charging Power 45 W 33 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging Yes (25 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (72% in 30 min) Yes
Full Charge Time 0:59 h n/a
Battery Life Test
Battery Life
Samsung Galaxy S25 Ultra
31:10
Xiaomi Redmi 15C 4G
n/a
Web Browsing11:10 hn/a
Video Playback19:32 hn/a
Games06:22 hn/a
Standby Mode160 hn/a

Main camera

Matrix 200 MP 50 MP
Photo resolution 16320x12240 pixels 8160x6144 pixels
Zoom Optical, 5x Digital
Flash LED LED
Stabilization Optical Digital
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 120 fps) No
1080p Recording Yes (Up to 240 fps) Yes (Up to 30 fps)
Slow Motion 240 fps (1080p) n/a
Wide-angle lens 120 ° n/a
Lenses count Standard: 200 MP
Telephoto: 50 MP
Telephoto: 12 MP
Ultra-wide: 50 MP		 Standard: 50 MP
Depth
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix200 MP50 MP
Aperturef/1.7f/1.8
Focal length23 mm28 mm
SensorSamsung ISOCELL S5KHP2n/a
Sensor size1/1.31/2
Pixel size0.6 μmn/a
AutofocusPhase autofocusPhase autofocus
StabilizationOpticalDigital
Telephoto
Matrix50 MPn/a
Aperturef/3.4n/a
Focal length111 mmn/a
SensorSony IMX854n/a
Sensor size1/2.52n/a
Pixel size0.7 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix50 MPn/a
Aperturef/1.9n/a
Focal length13 mmn/a
SensorSamsung ISOCELL S5KJN3n/a
Sensor size1/2.5n/a
Pixel size0.7 μmn/a
StabilizationDigitaln/a
Main camera DxOMark results
Photo quality
Samsung Galaxy S25 Ultra
144
Xiaomi Redmi 15C 4G
n/a
Video quality
Samsung Galaxy S25 Ultra
143
Xiaomi Redmi 15C 4G
n/a
Overall camera score
Samsung Galaxy S25 Ultra
146
Xiaomi Redmi 15C 4G
n/a
Bokeh70n/a
Preview81n/a
Zoom149n/a
Sources: DxOMark [Samsung Galaxy S25 Ultra]

Front camera

Matrix 12 MP 8 MP
Photo resolution 4000x3000 pixels n/a
Aperture f/2.2 f/2.0
Focal length 26 mm n/a
Sensor Samsung S5K3LU CMOS
Sensor size 1/3.2 1/4.0
Pixel size 1.12 μm 1.12 μm
Autofocus Phase autofocus (Dual Pixel) No
Stabilization Digital No
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 5.4
Bluetooth features LE LE
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 No
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Varies by region
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, PCS1900n/a
3G BandsUMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900)n/a
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B29/B30/B66/B71)n/a
5G SupportYesNo

Sound

Speakers Stereo n/a
3.5 mm Jack No Yes
FM Radio No Yes
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy S25 Ultra
93 dB
Xiaomi Redmi 15C 4G
n/a

Other

Class Flagship Budget
Announced January, 2025 yr August, 2025 yr
Release Date February, 2025 yr August, 2025 yr
Launch Price ($) 1299 n/a
MSRP ($) n/a 120
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a

Note

Samsung Galaxy S25 Ultra:

Supports up to 2 eSIMs. The international model has 2 physical SIM slots, while the U.S. version has 1.","Uses Grade 5 titanium and Corning Gorilla Armor 2 glass on both sides.

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

Results

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

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