Home Phone comparison Samsung Galaxy M31 and Oppo Reno 15 - Which is better?

Samsung Galaxy M31 vs Oppo Reno 15

46 out 100
Samsung Galaxy M31
VS
75 out 100
Oppo Reno 15
Samsung Galaxy M31
Oppo Reno 15

Compared 2 smartphones : Samsung Galaxy M31 Manufactured in March, 2020, with display 6.4 with chipsetSamsung Exynos 7 Octa 9611, vs Oppo Reno 15, Manufactured in January, 2026 with chipsetQualcomm Snapdragon 7 Gen 4. 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 M31
  • Lighter design: 191g vs 197g
  • Supports Dolby Atmos
Reasons to choose Oppo Reno 15
  • Larger display: 6.59in
  • Higher pixel density: 460ppi
  • Higher refresh rate: 120Hz
  • Higher battery capacity: 6500mAh vs 6000mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Infrared port
  • Built-in eSIM
  • Includes charger

Versions

Available versions and configurations
Memory Options - 6/64 GB
- 6/128 GB
- 8/128 GB		 - 8/256 GB
- 8/512 GB
- 12/256 GB
- 12/512 GB
- 16/256 GB
- 16/512 GB
- 16/1024 GB

Review

Key Specs Samsung Galaxy M31 and Oppo Reno 15
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:
Samsung Galaxy M31
vs
Oppo Reno 15

Display

Display quality comparison
Type Super AMOLED AMOLED
Size 6.4 in 6.59 in
Resolution 1080x2340 pixels 1256x2760 pixels
Aspect ratio 19.5:9 20:9
Pixel density 403 ppi 460 ppi
Refresh rate 60 Hz 120 Hz
Adaptive refresh rate No Yes (60-120 Hz)
Max brightness 600 nits 600 nits
HDR support Yes HDR10 Yes, HDR10+
Screen-to-body ratio 84.1 % 88.5 %
Features Always-On Display - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy M31
614 nits
Oppo Reno 15
1312 nits
sRGB gamut142 %n/a
PWM (Flicker)208 Hzn/a
Response time8.5 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy M31]

Design & Build

Design and ergonomics comparison
Height 159.2 mm (6.27 in) 158.3 mm (6.23 in)
Width 75.1 mm (2.96 in) 74.83 mm (2.95 in)
Thickness 8.9 mm (0.35 in) 7.77 mm (0.31 in)
Weight 191 g (6.74 oz) 197 g (6.95 oz)
Water resistance No IP69
Cooling system n/a Vapor chamber
Back panel Plastic Glass
Frame Plastic Metal
Colors - Black
- Blue
- Red		 - White
- Blue
Fingerprint sensor Yes rear Yes, In-Display
Screen-to-body ratio
Samsung Galaxy M31
84.1 %
Oppo Reno 15
88.5 %

Performance

Testing Samsung Galaxy M31 and Oppo Reno 15 In benchmarks
Processor
Chipset Samsung Exynos 7 Octa 9611 Qualcomm Snapdragon 7 Gen 4
Max Frequency 2300 MHz 2800 MHz
CPU Cores 8 (4 + 4) 8 (1 + 4 + 3)
Architecture - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)		 - 3/1.84 (Kryo Silver (Cortex-520))
- 4/2.4 (Kryo Gold (Cortex-720))
- 1/2.8 (Kryo Prime (Cortex-720))
Process Samsung TSMC
Transistor Size 10 nm 4 nm
Neural Processor Yes Yes
Graphics Mali-G72 MP3 n/a
GPU Cores 54 n/a
GPU Frequency 850 MHz n/a
FLOPS 113.8 GFLOPS n/a
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy M31
505
Oppo Reno 15
1270
Geekbench 6 (Multi-Core)
Samsung Galaxy M31
1547
Oppo Reno 15
4106
Geekbench 6 (Single-Core)5051270
Geekbench 6 (Multi-Core)15474106
Sources: Geekbench v6 [Oppo Reno 15]
AnTuTu 10
AnTuTu 10
Samsung Galaxy M31
257150
Oppo Reno 15
1394716
CPU73640481018
GPU45350327987
Memory62516249030
UX75644336681
NanoReview Score2571501394716
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy M31
820
Oppo Reno 15
n/a
Max Surface Temp.45.2 °Cn/a
Stability74 %n/a
Graphics Test4 fpsn/a
Graphics Score820n/a
Sources: 3DMark [Samsung Galaxy M31]

Memory

RAM
RAM Size 6 GB 8 GB
Memory Type LPDDR4X LPDDR5X
Memory Frequency 1866 MHz n/a
Channels 2 4
Storage
Storage Capacity128 GB256 GB
Storage TypeUFS 2.1UFS 3.1
Memory CardMicroSDNo

Software

OS Android 10 (Upgradeable to Android 12) Android 16
OS Size 15 GB n/a
UI Skin One UI 4.1 ColorOS 16

Battery

Volume 6000 mAh 6500 mAh
Max Charging Power 15 W 80 W
Battery Type Li-ion Silicon Carbon (Si/C)
Removable No No
Wireless Charging No No
Reverse Charging No Yes
Fast Charging Yes Samsung Adaptive Fast Charge (45% in 60 min) Yes (68% in 30 min)
Full Charge Time 2:25 h 0:57 h
Battery Life Test
Battery Life
Samsung Galaxy M31
24:27
Oppo Reno 15
29:05
Web Browsing10:13 h11:50 h
Video Playback14:16 h17:46 h
Games05:44 h06:35 h
Standby Mode117 h139 h

Main camera

Matrix 64 MP 50 MP
Photo resolution 9248x6920 pixels 8192x6144 pixels
Zoom Digital Optical, 3.5x
Flash LED LED
Stabilization Digital Optical
8K Recording No No
4K Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
Slow Motion 240 fps (720p) 120 fps (1080p)
Wide-angle lens 123 ° 116 °
Lenses count Standard: 64 MP
Ultra-wide: 8 MP
Macro: 5 MP
Depth: 5 MP		 Standard: 50 MP
Telephoto: 50 MP
Ultra-wide: 8 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
Main lens
Matrix64 MP50 MP
Aperturef/1.8f/1.8
Focal length26 mm26 mm
SensorISOCELL Bright GW1Sony LYT-600
Sensor size1/1.721/1.95 (0.51)
Pixel size0.8 μm0.8 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalOptical
Telephoto
Matrixn/a50 MP
Aperturen/af/2.8
Focal lengthn/a85 mm
Sensorn/aSamsung ISOCELL JN5
Sensor sizen/a1/2.76 (0.36)
Pixel sizen/a0.64 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrix8 MP8 MP
Aperturef/2.2f/2.2
Focal length12 mm15 mm
Sensorn/aOmniVision OV08D
Sensor size1/4.01/4.0 (0.25)
Pixel size1.12 μm1.12 μm
StabilizationDigitalDigital

Front camera

Matrix 32 MP 50 MP
Photo resolution 6528x4896 pixels 8192x6144 pixels
Aperture f/2.0 f/2.0
Focal length 26 mm 18 mm
Sensor Sony IMX616 Samsung ISOCELL S5KJN5
Sensor size 1/2.8 1/2.76 (0.36)
Pixel size 0.8 μm 0.64 μm
Autofocus No Phase autofocus
Stabilization Digital Digital
Video resolution 2160p (4K) 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 5.4
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP 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
- Beidou
- Galileo
- QZSS
NFC* Varies by region Varies by region
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoYes
Hybrid SlotNoNo
2G BandsGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2GSM 850/900/1800/1900MHz
3G BandsHSDPA 850 / 900 / 1900 / 2100WCDMA 1/2/4/5/8
LTE Bands*LTE (B1/B3/B5/B8/B20/B40/B41)LTE (B1/B2/B3/B4/B5/B7/B8/B18/B19/B20/B26/B28/B66/B71)
LTE category12n/a
5G SupportNoYes

Sound

Speakers Mono n/a
3.5 mm Jack Yes No
FM Radio Yes No
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy M31
81.7 dB
Oppo Reno 15
n/a

Other

Class Mid-range Mid-range
Announced February, 2020 yr January, 2026 yr
Release Date March, 2020 yr January, 2026 yr
Launch Price ($) 220 n/a
MSRP ($) n/a 549
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a Yes, 80 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Oppo Reno 15 the clear winner in this comparison.

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