Home Phone comparison Samsung Galaxy S21 Plus and Realme 15T - Which is better?

Samsung Galaxy S21 Plus vs Realme 15T

67 out 100
Samsung Galaxy S21 Plus
VS
66 out 100
Realme 15T
Samsung Galaxy S21 Plus
Realme 15T

Compared 2 smartphones : Samsung Galaxy S21 Plus Manufactured in February, 2021, with display 6.7 with chipsetSamsung Exynos 2100, vs Realme 15T, Manufactured in September, 2025 with chipsetMediaTek Dimensity 6400 Max. 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
  • Larger display: 6.7in
  • Supports newer USB: 3.2 vs 2
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Realme 15T
  • Higher pixel density: 401ppi
  • Lighter design: 181g vs 200g
  • Higher battery capacity: 7000mAh vs 4800mAh
  • Newer Bluetooth version: 5.3 vs 5
  • Infrared port
  • Includes charger

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 8/256 GB		 - 8/128 GB
- 8/256 GB
- 12/256 GB
- 12/512 GB

Review

Key Specs Samsung Galaxy S21 Plus and Realme 15T
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 15T

Display

Display quality comparison
Type Dynamic AMOLED AMOLED
Size 6.7 in 6.57 in
Resolution 1080x2400 pixels 1080x2372 pixels
Aspect ratio 20:9 20:9
Pixel density 394 ppi 401 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (48-120 Hz) Yes (60-120 Hz)
Max brightness 1300 nits 4000 nits
HDR support Yes HDR10+ No
Touch Sampling Rate n/a 240 Hz
Screen-to-body ratio 88.7 % 87.6 %
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 15T
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) 158.36 mm (6.23 in)
Width 75.6 mm (2.98 in) 75.19 mm (2.96 in)
Thickness 7.8 mm (0.31 in) 7.79 mm (0.31 in)
Weight 200 g (7.05 oz) 181 g (6.38 oz)
Water resistance IP68 IP69
Back panel Glass Plastic
Frame Metal Plastic
Colors - Black
- Silver
- Gold
- Red
- Purple		 - Silver
- Gray
- Blue
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy S21 Plus
88.7 %
Realme 15T
87.6 %

Performance

Testing Samsung Galaxy S21 Plus and Realme 15T In benchmarks
Processor
Chipset Samsung Exynos 2100 MediaTek Dimensity 6400 Max
Max Frequency 2840 MHz 2500 MHz
CPU Cores 8 (1 + 3 + 4) 8 (2 + 6)
Architecture - 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)		 - 6/2 (Cortex-A55)
- 2/2.5 (Cortex-A76)
Process Samsung TSMC
Transistor Size 5 nm 6 nm
Neural Processor Yes Yes
Graphics Mali-G78 MP14 Mali-G57 MP2
GPU Cores 896 64
GPU Frequency 854 MHz 1072 MHz
FLOPS 1530.4 GFLOPS 137.2 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S21 Plus
1428
Realme 15T
808
Geekbench 6 (Multi-Core)
Samsung Galaxy S21 Plus
3840
Realme 15T
2046
Geekbench 6 (Single-Core)1428808
Geekbench 6 (Multi-Core)38402046
Geekbench Compute (GPU)n/a1424
Sources: Geekbench v6 [Realme 15T]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S21 Plus
919348
Realme 15T
605158
CPU262973223513
GPU29438248052
Memory147307167188
UX214686166405
NanoReview Score919348605158
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S21 Plus
5538
Realme 15T
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 8 GB
Memory Type LPDDR5 LPDDR4X
Memory Frequency 2750 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity- 128 GB
- 256 GB		128 GB
Storage TypeUFS 3.1UFS 2.2
Memory CardNoMicroSD

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 60 W
Battery Type Li-ion Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) Yes
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 15T
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 Optical
8K Recording Up to 24FPS No
4K Recording Yes (Up to 60 fps) No
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 960 fps (720p) 120 fps (720p)
Wide-angle lens 120 ° n/a
Lenses count Standard: 12 MP
Telephoto: 64 MP
Ultra-wide: 12 MP		 Standard: 50 MP
Depth: 2 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix12 MP50 MP
Aperturef/1.8f/1.8
Focal length26 mm27 mm
SensorSony IMX555Omnivision OV50D40 Light Hunter 400
Sensor size1/1.761/2.88
Pixel size1.8 μm0.61 μm
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalOptical
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 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
SensorSony IMX563n/a
Sensor size1/2.55n/a
Pixel size1.4 μmn/a
StabilizationDigitaln/a
Main camera DxOMark results
Photo quality
Samsung Galaxy S21 Plus
129
Realme 15T
n/a
Video quality
Samsung Galaxy S21 Plus
137
Realme 15T
n/a
Overall camera score
Samsung Galaxy S21 Plus
133
Realme 15T
n/a
Bokeh70n/a
Preview72n/a
Zoom126n/a
Sources: DxOMark [Samsung Galaxy S21 Plus]

Front camera

Matrix 10 MP 50 MP
Photo resolution 3872x2592 pixels 8192x6144 pixels
Aperture f/2.2 f/1.8
Focal length 26 mm 27 mm
Sensor Sony IMX374 Omnivision OV50D40 Light Hunter 400
Sensor size 1/3.24 1/2.88
Pixel size 1.22 μm 0.61 μm
Autofocus Phase autofocus (Dual Pixel) No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 1080p (Full HD) at 60 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 5.3
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 Varies by region
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 No
Dolby Atmos Yes n/a
Speaker Test
Max Volume
Samsung Galaxy S21 Plus
87.8 dB
Realme 15T
n/a

Other

Class Flagship Mid-range
Announced January, 2021 yr September, 2025 yr
Release Date February, 2021 yr September, 2025 yr
Launch Price ($) 1000 n/a
MSRP ($) n/a 230
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, 60 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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