Samsung Galaxy S21+ 5G vs Xiaomi Redmi Note 12 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 January 11, 2023
Release Year 2021 2023

Physical

Volume 95.23 cm³ 101.13 cm³
Screen Size to Weight Ratio 3.35 "/g 3.55 "/g
Weight 200 g 188 g
Height 161.5 mm 165.9 mm
Width 75.6 mm 76.2 mm
Thickness 7.8 mm 8 mm
Foldable Design No No
Available Colors
  • Phantom Violet
  • Phantom Pink
  • Phantom Black
  • Phantom Silver
  • Phantom Gold
  • Phantom Red
  • Frosted Green
  • Matte Black
  • Mystique Blue

Display

Screen Size 6.7 " 6.67 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 88.8 % 85 %
Pixel Density 394 PPI 395 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1300 nits 1200 nits

Hardware

Battery Capacity per Screen Area 106.93 mAh/in² 112.39 mAh/in²
Battery Density 50.4 mAh/cm³ 49.44 mAh/cm³
Battery Capacity 4800 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Qualcomm SM4375 Snapdragon 4 Gen 1 (6 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (2x2.0 GHz Cortex-A78 & 6x1.8 GHz Cortex-A55)
GPU Mali-G78 MP14 - International Adreno 619

Connectivity

USB Version 3.2 2.0
OTG Support 1 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 3.2, OTG USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 11 12
Maximum OS Version 15

Comparison Summary

Smartphone Comparison: Samsung Galaxy S21+ 5G vs. Xiaomi Redmi Note 12

1. Specifications Comparison

FeatureSamsung Galaxy S21+ 5GXiaomi Redmi Note 12Practical Impact
Design
Dimensions161.5 x 75.6 x 7.8 mm165.9 x 76.2 x 8 mmRedmi Note 12 is slightly taller and thicker, potentially feeling less comfortable in hand for some users.
Weight200g188gRedmi Note 12 is lighter, which may be more comfortable for extended use.
Display
Size6.7"6.67"Negligible difference in screen size.
Resolution1080 x 24001080 x 2400Both offer the same sharp image quality.
Pixel Density394 PPI395 PPIVirtually identical sharpness.
TechnologyAMOLEDAMOLEDVibrant colors and deep blacks on both.
Refresh Rate120Hz120HzSmooth scrolling and animations on both.
Brightness1300 nits1200 nitsS21+ 5G will be slightly more visible in bright sunlight.
Performance
ChipsetExynos 2100 (5 nm)Snapdragon 4 Gen 1 (6 nm)S21+ 5G offers significantly faster processing and graphics performance.
AnTuTu Score749,100460,800S21+ 5G handles demanding tasks, multitasking, and gaming far more smoothly.
GPUMali-G78 MP14Adreno 619S21+ 5G has a more powerful GPU, offering better graphics in games.
Camera
Rear Main Camera12MP, f/1.8, 1/1.76" sensor48MP, f/1.8, 1/2.76" sensorRedmi Note 12 has higher resolution, but S21+ 5G has a larger sensor for better low-light performance and dynamic range.
Telephoto Camera64MP, f/2.0, 1/1.72" sensorNoneS21+ 5G offers superior zoom capabilities and portrait photography.
Wide Angle + Macro Camera12.2MP, f/2.2, 1/2.55" sensorNoneS21+ 5G offers an additional wide angle + Macro lens.
Wide Angle Lens CameraNone8MP, f/2.2, 1/4" sensorRedmi Note 12 offers a dedicated wide-angle lens for more versatile shooting.
Macro Lens CameraNone2MP, f/2.4Redmi Note 12 offers a dedicated macro camera for close up photography.
Front Camera10MP, f/2.2, 1/3.2" sensor13MP, f/2.45Redmi Note 12 has slightly higher resolution for selfies. S21+ 5G has a slightly wider aperture for better low light selfies.
VideoUp to 8K@24fpsUp to 1080p@30fpsS21+ 5G offers significantly higher video recording capabilities.
DxOMark (Mobile)11169S21+ 5G has superior camera performance.
Camera Features4K/8K Video, Optical Zoom/OISUltra Stable videoS21+ 5G offers more advanced features, particularly for video and zoom. Redmi Note 12 focuses on smooth video with ultra stable video.
Battery
Capacity4800 mAh5000 mAhRedmi Note 12 has a slightly larger battery, potentially offering slightly longer battery life.
Charging25W Fast Charging33W Fast ChargingRedmi Note 12 charges faster.
Battery Features15W Wireless Charging, Reverse Wireless ChargingNoneS21+ 5G offers more versatile charging options.
Software
OSAndroid 11 (upgradable to 15)Android 12Redmi Note 12 comes with a newer Android version out of the box. S21+ 5G is upgradeable to Android 15.
Connectivity
Wi-FiWi-Fi 6Wi-Fi 5S21+ 5G supports a newer WiFi standard, offering potentially faster and more reliable connectivity.
Bluetooth5.05.1Redmi Note 12 offers a newer Bluetooth version.
GPSDual-band GPSDual-band GPSSimilar location accuracy and capabilities on both phones.
SIMDual SIM (Nano + Nano/eSIM)Dual SIM (Nano + Nano)S21+ 5G provides the option of using an eSIM in addition to physical SIM cards.
Storage
Internal128GB/256GB128GB/256GBBoth devices offer similar storage configurations.
RAM8GB4GB/6GB/8GBS21+ 5G ensures smooth multitasking with 8GB. Redmi Note 12 can be configured with 4GB, 6GB, or 8GB.
Expandable StorageNoNoNeither phone has expandable storage.
Audio
QualityDolby Atmos, Hi-Res Audio, Stereo SpeakersBasic AudioS21+ 5G offers superior audio quality for media consumption.
Security
FeaturesBasic fingerprint sensorSide-mounted fingerprint sensorRedmi Note 12 uses a more convenient side mounted sensor.
Build Quality
Screen ProtectionCorning Gorilla Glass VictusCorning Gorilla Glass 3S21+ 5G has more durable screen protection.
Sensors
ListBiometric: Fingerprint; Proximity: Proximity; Motion: Accelerometer, Compass, Gyroscope; Environmental: BarometerBiometric: Fingerprint; Motion: Accelerometer, Compass, Gyroscope; Proximity: Ultrasonic proximity virtualS21+ 5G has additional environmental sensors (Barometer), whilst Redmi Note 12 has Ultrasonic virtual proximity.

2. Key Differences Analysis

Samsung Galaxy S21+ 5G Advantages:

  • Significantly Superior Performance: The Exynos 2100 chipset provides a substantially faster and smoother experience in demanding tasks, gaming, and multitasking.
  • Higher Quality Camera System: Offers better image quality, especially in low light, plus additional lenses (telephoto and wide angle/macro) and better video recording capabilities (up to 8K).
  • Advanced Features: Includes wireless charging, reverse wireless charging, and more advanced audio features.
  • Better Display Brightness: Provides better visibility in bright outdoor conditions with higher peak brightness.
  • Enhanced Build Quality: Features the more durable Corning Gorilla Glass Victus screen protection.

Xiaomi Redmi Note 12 Advantages:

  • Longer Battery Life (Potentially): Larger battery and faster charging offers slightly better battery life and faster recharge times.
  • Newer Bluetooth Version: Includes Bluetooth 5.1
  • Side-mounted Fingerprint Sensor: The side-mounted fingerprint sensor is more accessible and quicker for some users than in-display fingerprint.
  • Lower price: Redmi Note 12 is typically sold at a lower price point.
  • Dedicated Wide Angle and Macro Lenses: Offers dedicated lenses for versatile photography.

Significant Trade-offs:

  • The S21+ 5G is significantly more expensive, but offers far superior performance and features.
  • The Redmi Note 12 sacrifices performance and camera quality for a more budget-friendly option, longer battery life, and faster charging.
  • The S21+ does not include a wall charger in the box.

3. User Profiles & Recommendations

Samsung Galaxy S21+ 5G Ideal User:

  • Power Users: Individuals who require a device capable of handling intensive tasks, gaming, and demanding applications.
  • Photography Enthusiasts: Users who prioritize high-quality photos and videos, especially in varying lighting conditions, and desire more versatile shooting options.
  • Media Consumers: Those who value high-quality audio and visuals for streaming and media consumption.
  • Users Who Value Premium Features: Those who appreciate wireless charging and a more durable build.
  • Users Who Need Enhanced Productivity: Users who want a fast and reliable smartphone for multitasking and productivity on the go.

Specific Use Cases:

  • Gaming: High frame rates and smooth graphics in demanding games.
  • Content Creation: Capturing professional-quality photos and videos, particularly in low light.
  • Productivity: Efficient multitasking and handling of demanding apps.
  • Travel: Fast Wi-Fi and reliable GPS for navigation and connectivity.

Xiaomi Redmi Note 12 Ideal User:

  • Budget-Conscious Consumers: Individuals seeking a capable smartphone with essential features at an affordable price.
  • Casual Users: Those who prioritize battery life and general daily usage over demanding performance and cameras.
  • Users who Prefer Physical Sensors: Users who prefer fingerprint sensors that are located on the side of the device.
  • Users Who Like Versatile Lenses Users who want a dedicated macro and wide angle lens.

Specific Use Cases:

  • Everyday Use: Browsing the web, social media, and basic app usage.
  • Long Battery Life: Extended usage between charges, ideal for travel or long days.
  • Photography: Adequate photos in good light.
  • Budget-friendly Gaming: Gaming at lower graphical fidelity and performance.

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The S21+ 5G is a higher-end device, while the Redmi Note 12 is aimed at budget-conscious buyers.
  2. How important is performance? If you are a gamer or power user, the S21+ 5G is significantly better.
  3. How important is camera quality? If you prioritize high-quality photos and videos, the S21+ 5G is the better option.

Scenario-Based Recommendations:

  • Scenario 1: High-Performance User: If you frequently play demanding games or edit videos, and require smooth multitasking, choose the Samsung Galaxy S21+ 5G despite its higher cost.
  • Scenario 2: Budget-Conscious User: If you mainly use your phone for social media, web browsing, and casual photography, and prefer a longer battery life, the Xiaomi Redmi Note 12 is a better fit.
  • Scenario 3: Camera Enthusiast: If you want great low light photos and high quality video, the Samsung Galaxy S21+ 5G is your best choice.
  • Scenario 4: Long Battery Life User: If you value a long battery life above all else, choose the Xiaomi Redmi Note 12 for its slightly larger battery and faster charging.

My Choice

If I were choosing between these two phones, I would select the Samsung Galaxy S21+ 5G. Although it's an older device, its vastly superior performance, camera capabilities, and additional features make it a more versatile and future-proof device. The Exynos 2100 chipset offers a much more fluid and enjoyable user experience, and the better camera system is crucial for my personal use case. While the lack of a wall charger and a higher price point are downsides, the overall value I would get from the S21+ 5G justifies the investment for me. The Redmi Note 12 is a fine budget option, but it does not meet the performance, camera quality, and feature requirements I have.

Emily Harper
Emily Harper

Technology Insights Specialist

Dedicated technology writer specializing in mobile device analysis and technology communication. Expert at translating complex smartphone features into clear, actionable insights for diverse audiences.

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  • Mobile technology analysis
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Bridging technical complexity with engaging, accessible narratives.