Home Phone comparison Oppo Realme C55 and Samsung Galaxy M21 - Which is better?

Oppo Realme C55 vs Samsung Galaxy M21

48 out 100
Oppo Realme C55
VS
45 out 100
Samsung Galaxy M21
Oppo Realme C55
Samsung Galaxy M21

Compared 2 smartphones : Oppo Realme C55 Manufactured in March, 2023, with display 6.72 with chipsetMediaTek Helio G88, vs Samsung Galaxy M21, Manufactured in March, 2020 with chipsetSamsung Exynos 7 Octa 9611. 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 Oppo Realme C55
  • Larger display: 6.72in
  • Higher refresh rate: 90Hz
  • Newer Bluetooth version: 5.2 vs 5
  • Includes charger
Reasons to choose Samsung Galaxy M21
  • Higher pixel density: 403ppi
  • Lighter design: 188g vs 189.5g
  • Higher battery capacity: 6000mAh vs 5000mAh
  • Supports Dolby Atmos

Versions

Available versions and configurations
Memory Options - 4/64 GB
- 4/128 GB
- 6/64 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB		 - 4/64 GB
- 6/128 GB

Review

Key Specs Oppo Realme C55 and Samsung Galaxy M21
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:
Oppo Realme C55
vs
Samsung Galaxy M21

Display

Display quality comparison
Type IPS LCD Super AMOLED
Size 6.72 in 6.4 in
Resolution 1080x2400 pixels 1080x2340 pixels
Aspect ratio 20:9 19.5:9
Pixel density 392 ppi 403 ppi
Refresh rate 90 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 680 nits 630 nits
HDR support No No
Touch Sampling Rate 180 Hz n/a
Screen-to-body ratio 86.7 % 84.2 %
Features n/a Always-On Display
Display test
Peak brightness (auto)
Oppo Realme C55
655 nits
Samsung Galaxy M21
608 nits
sRGB gamut100 %141.3 %
PWM (Flicker)n/a215 Hz
Response time21 ms9 ms
Contrast1471:1∞ Infinite
Sources: NotebookCheck [Oppo Realme C55], [Samsung Galaxy M21]

Design & Build

Design and ergonomics comparison
Height 165.6 mm (6.52 in) 159 mm (6.26 in)
Width 75.9 mm (2.99 in) 75.1 mm (2.96 in)
Thickness 7.89 mm (0.31 in) 8.9 mm (0.35 in)
Weight 189.5 g (6.68 oz) 188 g (6.63 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - Blue
- Green
- Yellow		 - Black
- Blue
- Green
Fingerprint sensor Yes In-Button Yes rear
Screen-to-body ratio
Oppo Realme C55
86.7 %
Samsung Galaxy M21
84.2 %

Performance

Testing Oppo Realme C55 and Samsung Galaxy M21 In benchmarks
Processor
Chipset MediaTek Helio G88 Samsung Exynos 7 Octa 9611
Max Frequency 2000 MHz 2300 MHz
CPU Cores 8 (2 + 6) 8 (4 + 4)
Architecture - 6/1.8 (Cortex-A55)
- 2/2 (Cortex-A75)		 - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)
Process TSMC Samsung
Transistor Size 12 nm 10 nm
Neural Processor MediaTek APU Yes
Graphics Mali-G52 MP2 Mali-G72 MP3
GPU Cores 48 54
GPU Frequency 1000 MHz 850 MHz
FLOPS 96 GFLOPS 113.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Oppo Realme C55
425
Samsung Galaxy M21
514
Geekbench 6 (Multi-Core)
Oppo Realme C55
1413
Samsung Galaxy M21
1558
Geekbench 6 (Single-Core)425514
Geekbench 6 (Multi-Core)14131558
AnTuTu 10
AnTuTu 10
Oppo Realme C55
274070
Samsung Galaxy M21
266455
CPU8173476468
GPU4192045756
Memory7495970269
UX7545773962
NanoReview Score274070266455
3DMark Wild Life
3DMark Wild Life
Oppo Realme C55
742
Samsung Galaxy M21
816
Max Surface Temp.47.8 °C44.1 °C
Stability98 %73 %
Graphics Test4 fps4 fps
Graphics Score742816
Sources: 3DMark [Oppo Realme C55], [Samsung Galaxy M21]
PCMark 3.0
PCMark 3.0
Oppo Realme C55
8633
Samsung Galaxy M21
n/a
Writing score9636n/a
Web score7137n/a
Video editing6212n/a
Data manipulation6028n/a
NanoReview Score8633n/a

Memory

RAM
RAM Size - 6 GB
- 8 GB		 - 4 GB
- 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1800 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity- 128 GB
- 256 GB		- 64 GB
- 128 GB
Storage TypeeMMC 5.1UFS 2.1
Memory CardMicroSDMicroSD

Software

OS Android 13 (Upgradeable to Android 14) Android 10.0 (Upgradeable to Android 12.0)
OS Size 20 GB 14.5 GB
UI Skin Realme UI 5.0 One Ui 4.1

Battery

Volume 5000 mAh 6000 mAh
Max Charging Power 33 W 15 W
Battery Type Li-Po Li-ion
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging Yes (27% in 30 min) Yes Samsung Adaptive Fast Charge (25% in 30 min)
Full Charge Time 1:09 h 2:35 h
Battery Life Test
Battery Life
Oppo Realme C55
22:19
Samsung Galaxy M21
24:03
Web Browsing07:44 h10:07 h
Video Playback12:22 h13:59 h
Games05:14 h05:35 h
Standby Mode124 h115 h

Main camera

Matrix 64 MP 48 MP
Photo resolution 9248x6944 pixels 8000x6000 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording No Yes (Up to 30 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 120 fps (720p) 240 fps (720p)
Wide-angle lens n/a 123 °
Lenses count Standard: 64 MP
Depth: 2 MP		 Standard: 48 MP
Ultra-wide: 8 MP
Depth: 5 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
Main lens
Matrix64 MP48 MP
Aperturen/af/2.0
Focal lengthn/a26 mm
SensorOmnivision OV64BSamsung S5KGM2
Sensor size1/21/2.0
Pixel size0.7 μm0.8 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrixn/a8 MP
Aperturen/af/2.2
Focal lengthn/a12 mm
Sensor sizen/a1/4.0
Pixel sizen/a1.12 μm
Stabilizationn/aDigital

Front camera

Matrix 8 MP 20 MP
Photo resolution 3264x2448 pixels 5184x3888 pixels
Aperture f/2.0 f/2.0
Focal length n/a 26 mm
Sensor CMOS CMOS
Autofocus No No
Stabilization Digital Digital
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
Bluetooth version 5.2 5
Bluetooth features LE PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode		 - Charging
- USB Storage Mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Varies by region Yes
Infrared Port No No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM 850/900/1800/1900GSM850, GSM900, DCS1800, PCS1900
3G BandsWCDMA Bands 1/5/8B1 (2100), B2 (1900), B5(850), B8 (900)
LTE Bands*LTE (B1/B3/B5/B8/B38/B40/B41)LTE (B1/B3/B5/B7/B8/B20/B38/B40/B41)
LTE category712
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio No Yes
Dolby Atmos No Yes
Speaker Test
Max Volume
Oppo Realme C55
80.6 dB
Samsung Galaxy M21
83.8 dB

Other

Class Budget Mid-range
Announced March, 2023 yr March, 2020 yr
Release Date March, 2023 yr March, 2020 yr
Launch Price ($) 160 210
Sensors - Proximity Sensor
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included Yes 33 W n/a
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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