Home Phone comparison Xiaomi Redmi 15 4G and Tecno Spark 40C - Which is better?

Xiaomi Redmi 15 4G vs Tecno Spark 40C

60 out 100
Xiaomi Redmi 15 4G
VS
55 out 100
Tecno Spark 40C
Xiaomi Redmi 15 4G
Tecno Spark 40C

Compared 2 smartphones : Xiaomi Redmi 15 4G Manufactured in August, 2025, with display 6.9 with chipsetQualcomm Snapdragon 685, vs Tecno Spark 40C, Manufactured in August, 2025 with chipsetMediaTek Helio G81. 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 Xiaomi Redmi 15 4G
  • Larger display: 6.9in
  • Higher pixel density: 374ppi
  • Higher refresh rate: 144Hz
  • Higher battery capacity: 7000mAh vs 6000mAh
Reasons to choose Tecno Spark 40C
  • Lighter design: 190g vs 224g
  • Newer Bluetooth version: 5.3 vs 5
  • Supports Dolby Atmos

Versions

Available versions and configurations
Memory Options - 6/128 GB
- 8/256 GB		 - 4/128 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Xiaomi Redmi 15 4G and Tecno Spark 40C
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
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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
Smartphones:
Xiaomi Redmi 15 4G
vs
Tecno Spark 40C

Display

Display quality comparison
Type IPS LCD IPS LCD
Size 6.9 in 6.67 in
Resolution 1080x2340 pixels 720x1600 pixels
Aspect ratio 19.5:9 20:9
Pixel density 374 ppi 263 ppi
Refresh rate 144 Hz 120 Hz
Adaptive refresh rate Yes Yes (60-120 Hz)
HDR support No No
Screen-to-body ratio 83.1 % 84.2 %

Design & Build

Design and ergonomics comparison
Height 171.1 mm (6.74 in) 165.6 mm (6.52 in)
Width 82.1 mm (3.23 in) 77 mm (3.03 in)
Thickness 8.6 mm (0.34 in) 8.4 mm (0.33 in)
Weight 224 g (7.9 oz) 190 g (6.7 oz)
Water resistance IP64 IP64
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Black
- Gray
- Purple		 - White
- Black
- Gray
- Blue
Fingerprint sensor Yes, In-Button Yes, In-Button
Screen-to-body ratio
Xiaomi Redmi 15 4G
83.1 %
Tecno Spark 40C
84.2 %

Performance

Testing Xiaomi Redmi 15 4G and Tecno Spark 40C In benchmarks
Processor
Chipset Qualcomm Snapdragon 685 MediaTek Helio G81
Max Frequency 2800 MHz 2000 MHz
CPU Cores 8 (4 + 4) 8 (2 + 6)
Architecture - 4/1.9 (Cortex-A53)
- 4/2.8 (Cortex-A73)		 - 6/1.7 (Cortex-A55)
- 2/2 (Cortex-A75)
Process TSMC TSMC
Transistor Size 6 nm 12 nm
Neural Processor Hexagon 686 Yes
Graphics Adreno 610 Mali-G52 MP2
GPU Cores 128 48
GPU Frequency 1260 MHz 820 MHz
FLOPS 322.6 GFLOPS 78.7 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Xiaomi Redmi 15 4G
475
Tecno Spark 40C
444
Geekbench 6 (Multi-Core)
Xiaomi Redmi 15 4G
1514
Tecno Spark 40C
1372
Geekbench 6 (Single-Core)475444
Geekbench 6 (Multi-Core)15141372
Sources: Geekbench v6 [Tecno Spark 40C]
AnTuTu 10
AnTuTu 10
Xiaomi Redmi 15 4G
380990
Tecno Spark 40C
245537
CPU11488576856
GPU5798835386
Memory10323664168
UX10488169127
NanoReview Score380990245537

Memory

RAM
RAM Size 6 GB 4 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 2133 MHz 1800 MHz
Channels 2 2
Storage
Storage Capacity128 GB128 GB
Storage TypeUFS 2.2eMMC 5.1
Memory CardMicroSDMicroSD

Software

OS Android 15 Android 15
UI Skin HyperOS 2.0 HIOS 15.1

Battery

Volume 7000 mAh 6000 mAh
Max Charging Power 33 W 18 W
Battery Type n/a Li-Po
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging Yes Yes

Main camera

Matrix 50 MP 13 MP
Zoom Digital Digital
Flash LED Dual LED
Stabilization Digital Digital
8K Recording No No
4K Recording No No
1080p Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
Lenses count Standard: 50 MP
Depth		 Standard: 13 MP
Depth
Features Bokeh effect - Bokeh effect
- Pro mode
Main lens
Matrix50 MP13 MP
Aperturef/1.8f/1.8
Focal lengthn/a27 mm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital

Front camera

Matrix 8 MP 8 MP
Aperture f/2.0 n/a
Sensor n/a CMOS
Autofocus No No
Stabilization Digital No
Video resolution 1080p (Full HD) at 30 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.3
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Galileo
NFC* Yes Varies by region
Infrared Port Yes Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
5G SupportNoNo

Sound

3.5 mm Jack Yes Yes
FM Radio No Yes
Dolby Atmos n/a Yes

Other

Class Budget Budget
Announced August, 2025 yr July, 2025 yr
Release Date August, 2025 yr August, 2025 yr
MSRP ($) 150 100
Sensors - Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes, 33 W Yes, 45 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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