Home Phone comparison Samsung Galaxy S21 Plus and Realme P4 5G - Which is better?

Samsung Galaxy S21 Plus vs Realme P4 5G

67 out 100
Samsung Galaxy S21 Plus
VS
69 out 100
Realme P4 5G
Samsung Galaxy S21 Plus
Realme P4 5G

Compared 2 smartphones : Samsung Galaxy S21 Plus Manufactured in February, 2021, with display 6.7 with chipsetSamsung Exynos 2100, vs Realme P4 5G, Manufactured in August, 2025with chipsetMediaTek Dimensity 7400. 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 S21 Plus
  • Higher pixel density: 394ppi
  • Supports newer USB: 3.2 vs 2
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Realme P4 5G
  • Larger display: 6.77in
  • Higher refresh rate: 144Hz
  • Lighter design: 185g vs 200g
  • Higher battery capacity: 7000mAh vs 4800mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Infrared port
  • Includes charger

Versions

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

Review

Key Specs Samsung Galaxy S21 Plus and Realme P4 5G
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:
Samsung Galaxy S21 Plus
vs
Realme P4 5G

Display

Display quality comparison
Type Dynamic AMOLED OLED
Size 6.7 in 6.77 in
Resolution 1080x2400 pixels 1080x2392 pixels
Aspect ratio 20:9 20:9
Pixel density 394 ppi 388 ppi
Refresh rate 120 Hz 144 Hz
Adaptive refresh rate Yes (48-120 Hz) Yes (60-120 Hz)
Max brightness 1300 nits 1600 nits
HDR support Yes HDR10+ Yes, HDR10+
Touch Sampling Rate n/a 240 Hz
Screen-to-body ratio 88.7 % 89.3 %
Features - DCI-P3
- Always-On Display		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy S21 Plus
879 nits
Realme P4 5G
n/a
sRGB gamut98.9 %n/a
PWM (Flicker)240 Hzn/a
Response time6.2 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S21 Plus]

Design & Build

Design and ergonomics comparison
Height 161.5 mm (6.36 in) 163.4 mm (6.43 in)
Width 75.6 mm (2.98 in) 75.88 mm (2.99 in)
Thickness 7.8 mm (0.31 in) 7.58 mm (0.3 in)
Weight 200 g (7.05 oz) 185 g (6.53 oz)
Water resistance IP68 IP66
Back panel Glass n/a
Frame Metal Plastic
Colors - Black
- Silver
- Gold
- Red
- Purple		 - Gray
- Blue
- Red
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy S21 Plus
88.7 %
Realme P4 5G
89.3 %

Performance

Testing Samsung Galaxy S21 Plus and Realme P4 5G In benchmarks
Processor
Chipset Samsung Exynos 2100 MediaTek Dimensity 7400
Max Frequency 2840 MHz 2600 MHz
CPU Cores 8 (1 + 3 + 4) 8 (4 + 4)
Architecture - 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)		 - 4/2 (Cortex-A55)
- 4/2.6 (Cortex-A78)
Process Samsung TSMC
Transistor Size 5 nm 4 nm
Neural Processor Yes MediaTek APU 655
Graphics Mali-G78 MP14 Mali-G615 MP2
GPU Cores 896 256
GPU Frequency 854 MHz 1300 MHz
FLOPS 1530.4 GFLOPS 665.6 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S21 Plus
1428
Realme P4 5G
997
Geekbench 6 (Multi-Core)
Samsung Galaxy S21 Plus
3840
Realme P4 5G
2955
Geekbench 6 (Single-Core)1428997
Geekbench 6 (Multi-Core)38402955
AnTuTu 10
AnTuTu 10
Samsung Galaxy S21 Plus
919348
Realme P4 5G
745001
CPU262973209772
GPU294382175672
Memory147307180497
UX214686181060
NanoReview Score919348745001
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S21 Plus
5538
Realme P4 5G
n/a
Max Surface Temp.41.5 °Cn/a
Stability67 %n/a
Graphics Test33 fpsn/a
Graphics Score5538n/a
Sources: 3DMark [Samsung Galaxy S21 Plus]

Memory

RAM
RAM Size 8 GB 6 GB
Memory Type LPDDR5 n/a
Memory Frequency 2750 MHz n/a
Channels 2 n/a
Storage
Storage Capacity- 128 GB
- 256 GB		128 GB
Storage TypeUFS 3.1UFS 3.1
Memory CardNoNo

Software

OS Android 11 (Upgradeable to Android 14) Android 15
OS Size 27.2 GB n/a
UI Skin One UI 6 Realme UI 6.0

Battery

Volume 4800 mAh 7000 mAh
Max Charging Power 25 W 80 W
Battery Type Li-ion Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (54% in 30 min) Yes
Full Charge Time 1:12 h n/a
Battery Life Test
Battery Life
Samsung Galaxy S21 Plus
20:53
Realme P4 5G
n/a
Web Browsing07:28 hn/a
Video Playback13:15 hn/a
Games05:04 hn/a
Standby Mode105 hn/a

Main camera

Matrix 12 MP 50 MP
Photo resolution 4000x3000 pixels 8192x6144 pixels
Zoom Optical, 1.1x Digital
Flash Dual LED LED
Stabilization Optical Digital
8K Recording Up to 24FPS No
4K Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 960 fps (720p) 240 fps (720p)
Wide-angle lens 120 ° 112 °
Lenses count Standard: 12 MP
Telephoto: 64 MP
Ultra-wide: 12 MP		 Standard: 50 MP
Ultra-wide: 8 MP
Features - Bokeh effect
- Pro mode
- RAW support		 Bokeh effect
Main lens
Matrix12 MP50 MP
Aperturef/1.8f/1.8
Focal length26 mm27 mm
SensorSony IMX555n/a
Sensor size1/1.76n/a
Pixel size1.8 μmn/a
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Telephoto
Matrix64 MPn/a
Aperturef/2.0n/a
Focal length28 mmn/a
SensorSamsung Bright S5KGW2n/a
Sensor size1/1.72n/a
Pixel size0.8 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix12 MP8 MP
Aperturef/2.2f/2.2
Focal length13 mmn/a
SensorSony IMX563n/a
Sensor size1/2.55n/a
Pixel size1.4 μmn/a
StabilizationDigitalDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy S21 Plus
129
Realme P4 5G
n/a
Video quality
Samsung Galaxy S21 Plus
137
Realme P4 5G
n/a
Overall camera score
Samsung Galaxy S21 Plus
133
Realme P4 5G
n/a
Bokeh70n/a
Preview72n/a
Zoom126n/a
Sources: DxOMark [Samsung Galaxy S21 Plus]

Front camera

Matrix 10 MP 16 MP
Photo resolution 3872x2592 pixels 4920x3264 pixels
Aperture f/2.2 f/2.4
Focal length 26 mm n/a
Sensor Sony IMX374 n/a
Sensor size 1/3.24 n/a
Pixel size 1.22 μm n/a
Autofocus Phase autofocus (Dual Pixel) No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 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 MiMO
- 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 LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- USB-Host mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes No
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM 850, 900, 1800, 1900 MHzGSM 850/900/1800MHz
3G BandsWCDMA Band 1, 2, 4, 5, 8WCDMA 1/5/8
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66)LTE (B1/B3/B5/B8/B40/B41)
LTE category24n/a
5G SupportYesYes

Sound

Speakers Stereo n/a
3.5 mm Jack No No
FM Radio No n/a
Dolby Atmos Yes n/a
Speaker Test
Max Volume
Samsung Galaxy S21 Plus
87.8 dB
Realme P4 5G
n/a

Other

Class Flagship Mid-range
Announced January, 2021 yr August, 2025 yr
Release Date February, 2021 yr August, 2025 yr
Launch Price ($) 1000 n/a
MSRP ($) n/a 210
Sensors - Hall Sensor
- Barometer
- 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

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