Home Phone comparison OnePlus 9 and Xiaomi Redmi 15C 4G - Which is better?

OnePlus 9 vs Xiaomi Redmi 15C 4G

63 out 100
OnePlus 9
VS
56 out 100
Xiaomi Redmi 15C 4G
OnePlus 9
Xiaomi Redmi 15C 4G

Compared 2 smartphones : OnePlus 9 Manufactured in March, 2021, with display 6.55 with chipsetQualcomm Snapdragon 888 5G, vs Xiaomi Redmi 15C 4G, Manufactured in August, 2025 with 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 OnePlus 9
  • Higher pixel density: 402ppi
  • Lighter design: 192g vs 205g
  • Supports newer USB: 3.1 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos
Reasons to choose Xiaomi Redmi 15C 4G
  • Larger display: 6.9in
  • Higher battery capacity: 6000mAh vs 4500mAh
  • Newer Bluetooth version: 5.4 vs 5.2

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 12/256 GB		 - 4/128 GB
- 4/256 GB

Review

Key Specs OnePlus 9 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.
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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:
OnePlus 9
vs
Xiaomi Redmi 15C 4G

Display

Display quality comparison
Type AMOLED IPS LCD
Size 6.55 in 6.9 in
Resolution 1080x2400 pixels 720x1600 pixels
Aspect ratio 20:9 20:9
Pixel density 402 ppi 254 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes Yes (60-120 Hz)
Max brightness 500 nits n/a
HDR support Yes HDR10+ No
Screen-to-body ratio 87.3 % 84.2 %
Features - DCI-P3
- Always-On Display
- DC dimming		 n/a
Display test
Peak brightness (auto)
OnePlus 9
818 nits
Xiaomi Redmi 15C 4G
n/a
sRGB gamut98.9 %n/a
PWM (Flicker)323 Hzn/a
Response time13 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [OnePlus 9]

Design & Build

Design and ergonomics comparison
Height 160 mm (6.3 in) 171.6 mm (6.76 in)
Width 74.2 mm (2.92 in) 79.5 mm (3.13 in)
Thickness 8.7 mm (0.34 in) 8 mm (0.31 in)
Weight 192 g (6.77 oz) 205 g (7.23 oz)
Water resistance No IP64
Back panel Glass Eco Leather
Frame Plastic Plastic
Colors - Black
- Blue
- Purple		 - Gray
- Blue
- Green
- Orange
Fingerprint sensor Yes In-Display Yes, In-Button
Screen-to-body ratio
OnePlus 9
87.3 %
Xiaomi Redmi 15C 4G
84.2 %

Performance

Testing OnePlus 9 and Xiaomi Redmi 15C 4G In benchmarks
Processor
Chipset Qualcomm Snapdragon 888 5G MediaTek Helio G81 Ultra
Max Frequency 2840 MHz 2000 MHz
CPU Cores 8 (1 + 3 + 4) 8 (2 + 6)
Architecture - 4/1.8 (Kryo 680 Silver (Cortex-A55))
- 3/2.42 (Kryo 680 Gold (Cortex-A78))
- 1/2.84 (Kryo 680 Prime (Cortex-X1))		 - 6/1.7 (Cortex-A55)
- 2/2 (Cortex-A75)
Process Samsung TSMC
Transistor Size 5 nm 12 nm
Neural Processor Hexagon 780 Yes
Graphics Adreno 660 Mali-G52 MP2
GPU Cores 1024 48
GPU Frequency 840 MHz 820 MHz
FLOPS 1290.2 GFLOPS 78.7 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
OnePlus 9
1489
Xiaomi Redmi 15C 4G
421
Geekbench 6 (Multi-Core)
OnePlus 9
3996
Xiaomi Redmi 15C 4G
1387
Geekbench 6 (Single-Core)1489421
Geekbench 6 (Multi-Core)39961387
AnTuTu 10
AnTuTu 10
OnePlus 9
937505
Xiaomi Redmi 15C 4G
278312
CPU24866284872
GPU30872335457
Memory16968574922
UX21043583061
NanoReview Score937505278312
3DMark Wild Life
3DMark Wild Life
OnePlus 9
5761
Xiaomi Redmi 15C 4G
n/a
Max Surface Temp.48.8 °Cn/a
Stability55 %n/a
Graphics Test34 fpsn/a
Graphics Score5761n/a
Sources: 3DMark [OnePlus 9]
PCMark 3.0
PCMark 3.0
OnePlus 9
12032
Xiaomi Redmi 15C 4G
n/a
Writing score15081n/a
Web score11112n/a
Video editing6018n/a
Data manipulation10751n/a
NanoReview Score12032n/a

Memory

RAM
RAM Size - 8 GB
- 12 GB		 4 GB
Memory Type LPDDR5 LPDDR4X
Memory Frequency 2750 MHz 1800 MHz
Channels 4 2
Storage
Storage Capacity- 128 GB
- 256 GB		128 GB
Storage TypeUFS 3.1eMMC 5.1
Memory CardNoMicroSD

Software

OS Android 11 (Upgradeable to Android 13) Android 15
OS Size 35 GB n/a
UI Skin OxygenOS 13 HyperOS 2.0

Battery

Volume 4500 mAh 6000 mAh
Max Charging Power 65 W 33 W
Battery Type Li-Po Li-Po
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging No No
Fast Charging Yes (100% in 29 min) Yes
Full Charge Time 0:29 h n/a
Battery Life Test
Battery Life
OnePlus 9
19:38
Xiaomi Redmi 15C 4G
n/a
Web Browsing07:52 hn/a
Video Playback11:44 hn/a
Games04:32 hn/a
Standby Mode96 hn/a

Main camera

Matrix 48 MP 50 MP
Photo resolution 8000x6000 pixels 8160x6144 pixels
Zoom Digital Digital
Flash Dual LED LED
Stabilization Digital Digital
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 120 fps) No
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 240 fps (1080p) n/a
Wide-angle lens 140 ° n/a
Lenses count Standard: 48 MP
Ultra-wide: 50 MP
Monochrome: 2 MP		 Standard: 50 MP
Depth
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix48 MP50 MP
Aperturef/1.8f/1.8
Focal length23 mm28 mm
SensorSony IMX689n/a
Sensor size1/1.431/2
Pixel size1.12 μmn/a
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrix50 MPn/a
Aperturef/2.2n/a
Focal length14 mmn/a
SensorSony IMX766n/a
Sensor size1/1.56n/a
Pixel size1 μmn/a
StabilizationDigitaln/a
Main camera DxOMark results
Photo quality
OnePlus 9
123
Xiaomi Redmi 15C 4G
n/a
Video quality
OnePlus 9
104
Xiaomi Redmi 15C 4G
n/a
Overall camera score
OnePlus 9
115
Xiaomi Redmi 15C 4G
n/a
Sources: DxOMark [OnePlus 9]

Front camera

Matrix 16 MP 8 MP
Photo resolution 4920x3264 pixels n/a
Aperture f/2.0 f/2.0
Sensor Sony IMX471 CMOS
Sensor size 1/3.06 1/4.0
Pixel size 1 μm 1.12 μm
Autofocus Phase autofocus 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 6 (802.11 a/b/g/n/ac/ax) 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 5.2 5.4
Bluetooth features LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 3.1 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort Yes No
GPS - GPS
- GLONASS
- Beidou
- Galileo
- SBAS		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Varies by region
Infrared Port No No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM B2, 3, 5, 8n/a
3G BandsWCDMA B1, 2, 4, 5, 8, 9, 19n/a
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B30/B32/B38/B39/B40/B41/B46/B48/B66/B71)n/a
LTE category20n/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
OnePlus 9
83 dB
Xiaomi Redmi 15C 4G
n/a

Other

Class Flagship Budget
Announced March, 2021 yr August, 2025 yr
Release Date March, 2021 yr August, 2025 yr
Launch Price ($) 730 n/a
MSRP ($) n/a 120
Sensors - Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

No clear favorite identified yet; updates may follow as new data arrives.

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