Home News Phone Reviews Video

Xiaomi Redmi 15C 4G vs Tecno Spark 40

Source： Date：

Xiaomi Redmi 15C 4G vs Tecno Spark 40

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

Here we compared two budget smartphones: the 6.9-inch Xiaomi Redmi 15C 4G (with MediaTek Helio G81 Ultra) that was released on August 1, 2025, against the Tecno Spark 40, which is powered by MediaTek Helio G81 and came out 1 month before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.

Memory
  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery life
  6. Camera
  7. Comments

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Xiaomi Redmi 15C 4G
  • Newer Bluetooth version (v5.4)
  • Comes with 800 mAh larger battery capacity: 6000 vs 5200 mAh
Reasons to consider the Tecno Spark 40
  • Stereo speakers
  • Supports higher wattage charging (45W versus 33W)
  • Supports Dolby Atmos sound technology
  • 24% faster in single-core GeekBench 6 test: 501 and 403 points
  • Weighs 17 grams less
  • Has a built-in infrared port

Review

Evaluation of Xiaomi Redmi 15C 4G and Tecno Spark 40 crucial features
Display
Screen quality, color accuracy, brightness
Camera
Photo and video recording quality
Performance
CPU and memory performance (apps, system)
Gaming
Capabilities for playing modern games
Battery
Battery life, charging type and speed
Connectivity
Networks, ports, data transmission
Scores with a red asterisk (*) are approximate and may change in the future as we gather more data.
NanoReview Score
Final comparison evaluation
Select your primary usage scenario to get a more accurate NanoReview Score
Primary usage:

Value for money (Beta)

To get an accurate value-for-money index, update the default prices with actual prices from your country’s retailers (for the selected memory configs) and press the "Calculate" button.
Currency
4 / 128 GB
VS
4 / 128 GB
147.5
(Excellent)
Value Index
133.0
(Excellent)

Tests and specifications

Comparison table of technical specifications and tests
Phone:
Redmi 15C 4G
vs
Spark 40

Display

TypeIPS LCDIPS LCD
Size6.9 inches6.67 inches
Resolution720 x 1600 pixels720 x 1600 pixels
Aspect ratio20:920:9
PPI254 ppi263 ppi
Refresh rate120 Hz120 Hz
Adaptive refresh rateYes (60-120 Hz)Yes (60-120 Hz)
Max rated brightness810 nits -
HDR supportNoNo
Touch sampling rate240 Hz -
Screen protectionCorning Gorilla Glass 3Tempered glass
Screen-to-body ratio84.3%84.2%
Screen space comparison
Redmi 15C 4G
6.9″ (20:9 ratio) = 17.8 in2
Spark 40
6.67″ (20:9 ratio) = 16.6 in2
~7% more screen space

Design and build

Height171.56 mm (6.75 inches)165.6 mm (6.52 inches)
Width79.47 mm (3.13 inches)77 mm (3.03 inches)
Thickness7.99 mm (0.31 inches)7.7 mm (0.3 inches)
Weight205 g (7.23 oz)188 g (6.63 oz)
WaterproofIP64IP64
Rear materialEco-leather -
Frame materialPlasticPlastic
ColorsBlack, Blue, Green, OrangeWhite, Black, Gray, Blue
Fingerprint scannerYes, in-buttonYes, in-button
Screen-to-body ratio

Performance

Tests of Xiaomi Redmi 15C 4G and Tecno Spark 40 in the benchmarks
SoC
ChipsetMediaTek Helio G81 UltraMediaTek Helio G81
Max clock2000 MHz2000 MHz
CPU cores8 (2 + 6)8 (2 + 6)
Architecture- 6 cores at 1.7 GHz: Cortex-A55
- 2 cores at 2 GHz: Cortex-A75		- 6 cores at 1.7 GHz: Cortex-A55
- 2 cores at 2 GHz: Cortex-A75
ManufacturingTSMCTSMC
Lithography process12 nanometers12 nanometers
Neural processor (NPU)YesYes
GraphicsMali-G52 MP2Mali-G52 MP2
GPU shading units4848
GPU clock820 MHz820 MHz
FLOPS~78.7 GFLOPS~78.7 GFLOPS

Benchmarks

Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
Geekbench Compute (GPU)915 -
Single-core score403501
Multi-core score13841410
AnTuTu Benchmark 10
Redmi 15C 4G+3%
263956
Spark 40
255412
CPU7698584479
GPU3538635504
Memory6982467616
UX8176167813
Total score263956255412
SamplesLess than 3Less than 3

Memory

RAM
RAM size4 GB4 GB
Memory typeLPDDR4XLPDDR4X
Memory clock1800 MHz1800 MHz
Channels22
Storage
Storage size128 GB128 GB
Storage typeeMMC 5.1eMMC 5.1
Memory cardMicroSDMicroSD
Memory card max sizeUp to 1024 GBUp to 1024 GB

Software

Operating systemAndroid 15 Android 15
ROMHyperOS 2.0HIOS 15

Battery

Capacity6000 mAh5200 mAh
Max charge power33 W45 W
Battery typeLi-PoLi-Po
ReplaceableNoNo
Wireless chargingNo No
Reverse chargingNoNo
Fast chargingYes (50% in 40 min)Yes (50% in 21 min)
Full charging time1:37 hr0:56 hr

Main camera

Matrix50 megapixels50 megapixels
Image resolution8160 x 6144 -
ZoomDigitalDigital
FlashLEDDual LED
StabilizationDigitalDigital
8K video recordingNoNo
4K video recordingNoNo
1080p video recordingUp to 30FPSUp to 30FPS
Lenses1) Standard: 50 MP
2) Depth
1) Standard: 50 MP
2) Depth
Camera features - Bokeh mode
- Pro mode		 - Bokeh mode
- Pro mode
Standard lens
Image resolution50 MP50 MP
Aperturef/1.8 -
Focal length28 mm -
SensorSamsung S5KJNS -
Sensor size1/2.96" -
Pixel size0.64 micron -
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital

Selfie camera

Megapixels8 megapixels8 megapixels
Aperturef/2.0 -
SensorSmartsens SC1320CSCMOS
Sensor size1/3.06" -
Pixel size1.12 micron -
AutofocusNoNo
StabilizationNoNo
Video resolution1080p (Full HD) at 30 FPS1080p (Full HD) at 30 FPS
Depth sensor (TOF 3D)NoNo

Connectivity

Wi-Fi standardWi-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 version5.45.3
Bluetooth featuresLELE
USB typeUSB Type-CUSB Type-C
USB version22
USB features - Charging
- USB-Storage mode
- OTG		 - Charging
- USB-Storage mode
- OTG
DisplayPortNoNo
GPSGPS, GLONASS, Beidou, GalileoGPS, GLONASS, Galileo
NFC*Depends on the regionDepends on the region
Infrared portNoYes
Network
Number of SIM*22
Type of SIM cardNanoNano
Multi SIM modeStandbyStandby
eSIM support*NoNo
Hybrid slotNoNo
5G supportNoNo

Sound

SpeakersMonoStereo
Headphone audio jackYesYes
FM radioYesYes
Dolby AtmosNoYes

Other

CategoryBudgetBudget
AnnouncedAugust 2025July 2025
Release dateAugust 2025July 2025
Launch price (MSRP)$179$130
Sensors - Accelerometer
- Ambient light sensor
- Compass
- Fingerprint		 - Proximity sensor
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
Bundled chargerYes, 33 WYes, 45 W
Further details
Notes on Redmi 15C 4G:
    - The back cover is either glass or eco-leather.
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Related recommendations
Scroll to Top