Samsung Galaxy Note20 5G vs Xiaomi Redmi A3x - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date August 21, 2020 May 24, 2024
Release Year 2020 2024

Physical

Volume 100.86 cm³ 106.65 cm³
Screen Size to Weight Ratio 3.49 "/g 3.48 "/g
Weight 192 g 193 g
Height 161.6 mm 168.4 mm
Width 75.2 mm 76.3 mm
Thickness 8.3 mm 8.3 mm
Foldable Design No No
Available Colors
  • Mystic Green
  • Mystic Bronze
  • Mystic Gray
  • Mystic Red
  • Mystic Blue
  • Midnight Black
  • Olive Green
  • Moonlight White (Starry White)
  • Aurora Green (Ocean Green)

Display

Screen Size 6.7 " 6.71 "
Resolution 1080 x 2400 720 x 1650
Aspect Ratio 20:9 21:9
Screen-to-Body Ratio 89.2 % 82.9 %
Pixel Density 393 PPI 268 PPI
Refresh Rate N/A 90 Hz
Typical Brightness N/A 500 nits
HBM Brightness N/A N/A
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 95.79 mAh/in² 111.05 mAh/in²
Battery Density 42.63 mAh/cm³ 46.88 mAh/cm³
Battery Capacity 4300 mAh 5000 mAh
NFC Support Yes No
Chipset Exynos 990 (7 nm+) - Global Unisoc T603 (22 nm)
CPU Octa-core (2x2.73 GHz Mongoose M5 & 2x2.50 GHz Cortex-A76 & 4x2.0 GHz Cortex-A55) - Global Octa-core 1.8 GHz
GPU Mali-G77 MP11 - Global 8

Connectivity

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

Software

Operating System Android Android
Initial OS Version 10 14
Maximum OS Version 13 16

Comparison Summary

1. Specifications Comparison

FeatureSamsung Galaxy Note20 5GXiaomi Redmi A3xPractical Impact
Design
Dimensions161.6 x 75.2 x 8.3 mm168.4 x 76.3 x 8.3 mmNote20 5G is slightly more compact, potentially easier to handle with one hand. Redmi A3x is taller and wider.
Weight192g193gNegligible difference. Both feel similar in hand.
Build Quality (Screen)Corning Gorilla Glass 5Corning Gorilla Glass 3Note20 5G is slightly more resistant to scratches and drops, offering better long-term durability.
Display
Size6.7"6.71"Virtually identical viewing area.
Resolution1080x2400720x1650Note20 5G offers significantly sharper images, text, and videos. Better for detailed content and media consumption.
PPI393268Note20 5G provides a noticeably crisper display, reducing pixelation.
TechnologyAMOLEDIPS LCDNote20 5G has superior contrast, deeper blacks, more vibrant colors, and better power efficiency with dark themes.
Refresh Rate60Hz90HzRedmi A3x provides smoother scrolling and animations.
Brightness0 nits0 nitsUnable to compare.
Performance
ChipsetExynos 990 (7 nm+)Unisoc T603 (22 nm)Note20 5G offers much faster app loading, smoother multitasking, and better gaming performance.
AnTuTu Score515,090239,000Note20 5G is significantly faster overall, suitable for demanding tasks and gaming.
GPUMali-G77 MP11Mali-G57 MP1Note20 5G handles graphics-intensive tasks and games much better.
Camera
Main Camera12MP, f/1.88MP, f/2.2Note20 5G captures more detailed photos, especially in low light, due to the larger aperture and sensor.
Selfie Camera10MP, f/2.05MP, f/2.2Note20 5G takes higher-resolution and brighter selfies.
Telephoto Lens64MP, f/2.0NoneNote20 5G allows for optical zoom and better quality zoomed-in photos.
Wide Angle Lens12MP, f/2.2NoneNote20 5G enables capturing wider scenes.
Video RecordingUp to 8K@24fpsUp to 1080p@30fpsNote20 5G captures much higher resolution video with advanced stabilization.
Battery
Capacity4300mAh5000mAhRedmi A3x will likely offer longer battery life.
Charging25W Fast Charging10W Fast ChargingNote20 5G charges much faster, reducing downtime.
Wireless ChargingYesNoNote20 5G offers convenient wireless charging.
Reverse ChargingYesNoNote20 5G can charge other devices wirelessly.
Software
OSAndroid 10 (Upgradable to 13)Android 14 (Upgradable to 16)Redmi A3x has a newer Android version out of the box and guaranteed updates, Note20 may stop getting software support.
Storage
Internal Storage128/256 GB64/128 GBNote20 5G offers more storage for apps, photos, and videos.
Expandable StorageNoNoNeither phone allows for storage expansion.
RAM8 GB3/4 GBNote20 5G handles multitasking much better.
Connectivity
Wi-FiWi-Fi 6Wi-Fi 5Note20 5G has faster and more efficient Wi-Fi connectivity.
Bluetooth5.04.2Note20 5G has a more modern and reliable Bluetooth connection.
GPSGPS, A-GPS, GLONASS, Beidou, GalileoGPS, A-GPS, GLONASS, BeidouNote20 5G has slightly better location accuracy.
Security
Fingerprint SensorBasicSide-mountedRedmi A3x has more ergonomic fingerprint sensor placement.
Audio
Audio QualityDolby Atmos, Dolby Digital PlusBasicNote20 5G offers enhanced audio experience with wider dynamic range.

2. Key Differences Analysis

Samsung Galaxy Note20 5G Advantages:

  • Superior Performance: Significantly faster processor and GPU for demanding tasks and gaming.
    • Practical Implication: Smoother app usage, better multitasking, and enjoyable gaming.
  • Better Display: Higher resolution AMOLED screen with vibrant colors and excellent contrast.
    • Practical Implication: Enhanced viewing experience for photos, videos, and general use.
  • Better Camera System: Versatile camera setup with telephoto and ultrawide lenses, plus 8K video recording.
    • Practical Implication: Higher quality photos and videos in various scenarios.
  • Faster Charging & Wireless Charging: Quickly replenish the battery and charge wirelessly.
    • Practical Implication: More convenient charging options.
  • Dolby Atmos: Better Audio Quality.

Xiaomi Redmi A3x Advantages:

  • Larger Battery: Longer battery life.
    • Practical Implication: Can last longer on a single charge.
  • Newer Android Version: Android 14 out of the box.
    • Practical Implication: Access to the latest features and security updates.
  • Side-Mounted Fingerprint Sensor: More ergonomic placement.
    • Practical Implication: Easier and more natural unlocking.
  • Higher Refresh Rate: Smoother scrolling.

Trade-offs:

  • Note20 5G sacrifices battery life for performance and features.
  • Redmi A3x provides longer battery life but with significantly lower performance and camera capabilities.

3. User Profiles & Recommendations

Samsung Galaxy Note20 5G Ideal Users:

  • Power Users: Those who need a fast and responsive phone for demanding apps, multitasking, and gaming.
  • Photography Enthusiasts: Individuals who want a versatile camera system for capturing high-quality photos and videos in various situations.
  • Media Consumers: People who enjoy watching videos and movies on their phone and appreciate a vibrant and high-resolution display.

    • Use Cases:
      • Gaming: Playing graphics-intensive mobile games smoothly.
      • Content Creation: Recording 8K videos and editing photos on the go.
      • Productivity: Multitasking between multiple apps seamlessly.

Xiaomi Redmi A3x Ideal Users:

  • Budget-Conscious Users: Those who prioritize affordability and long battery life.
  • Basic Users: Individuals who primarily use their phone for calls, texts, and light browsing.
  • Users Prioritizing Software Updates: People who want a phone with the latest Android version and guaranteed updates.

    • Use Cases:
      • Daily Communication: Making calls, sending texts, and checking emails.
      • Light Browsing: Surfing the web and using social media apps.
      • Long Battery Life: Going through a full day of moderate usage without needing to recharge.

4. Decision Framework

Consider these questions before making a decision:

  1. What is your budget? The Redmi A3x will likely be much cheaper.
  2. How important is performance to you? If you need a fast and responsive phone, the Note20 5G is the better choice.
  3. How much do you value camera quality? If you want a versatile camera system, the Note20 5G is the clear winner.

Scenario-Based Recommendations:

  • Scenario 1: Gaming and Multimedia - Choose the Samsung Galaxy Note20 5G for its superior performance, display, and audio quality.
  • Scenario 2: Budget and Battery Life - Choose the Xiaomi Redmi A3x for its lower price and longer battery life.
  • Scenario 3: All-Around Performance and Features - Choose the Samsung Galaxy Note20 5G for its balance of power, camera capabilities, and display quality, if budget is not a limiting factor.

My Choice

If I were choosing between these two phones, I would pick the Samsung Galaxy Note20 5G. Even though it's an older phone, the drastically superior performance, better display, and significantly more versatile camera system outweigh the Redmi A3x's longer battery life and newer software (although that is very important.) The Note20 5G will provide a much smoother and more enjoyable user experience for my typical use case, which includes photography, gaming, and productivity tasks. I'm willing to sacrifice some battery life for these benefits, and I can always manage with faster charging capabilities and wireless charging.

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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Bridging technical complexity with engaging, accessible narratives.