Samsung Galaxy A02s vs Samsung Galaxy S21 5G - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 4, 2021 January 29, 2021
Release Year 2021 2021

Physical

Volume 113.41 cm³ 85.33 cm³
Screen Size to Weight Ratio 3.32 "/g 3.67 "/g
Weight 196 g 169 g
Height 164.2 mm 151.7 mm
Width 75.9 mm 71.2 mm
Thickness 9.1 mm 7.9 mm
Foldable Design No No
Available Colors
  • Black
  • Red
  • Blue
  • White
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink

Display

Screen Size 6.5 " 6.2 "
Resolution 720 x 1600 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 81.8 % 85.9 %
Pixel Density 270 PPI 421 PPI
Refresh Rate N/A 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness N/A 1300 nits

Hardware

Battery Capacity per Screen Area 118.34 mAh/in² 104.06 mAh/in²
Battery Density 44.09 mAh/cm³ 46.88 mAh/cm³
Battery Capacity 5000 mAh 4000 mAh
NFC Support No Yes
Chipset Qualcomm SDM450 Snapdragon 450 (14 nm) Exynos 2100 (5 nm) - International
CPU Octa-core 1.8 GHz Cortex-A53 Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International
GPU Adreno 506 Mali-G78 MP14 - International

Connectivity

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

Software

Operating System Android Android
Initial OS Version 10 11
Maximum OS Version 12 15

Comparison Summary

Smartphone Comparison: Samsung Galaxy A02s vs. Samsung Galaxy S21 5G

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy A02s and Samsung Galaxy S21 5G, focusing on practical implications:

Design

FeatureSamsung Galaxy A02sSamsung Galaxy S21 5GPractical Impact
Dimensions164.2 × 75.9 × 9.1 mm151.7 × 71.2 × 7.9 mmA02s is larger and bulkier, S21 5G is more compact and pocketable, making it easier to handle
Weight196g169gS21 5G is noticeably lighter, providing better comfort during extended use.

Display

FeatureSamsung Galaxy A02sSamsung Galaxy S21 5GPractical Impact
Size6.5"6.2"A02s has a slightly larger screen, which might be better for media consumption. S21 is more compact.
Resolution720x16001080x2400S21 5G has a much sharper display, text and images will look clearer.
PPI270421S21 5G offers significantly higher pixel density, resulting in a sharper and more detailed display.
TechnologyPLS LCDAMOLEDS21 5G has superior color reproduction, deeper blacks, and better viewing angles. Also uses less power when using dark mode
Refresh Rate60Hz120HzS21 5G offers smoother animations and scrolling, resulting in a more fluid user experience.
Brightness0 nits1300 nitsS21 5G has a vastly brighter screen, ensuring better visibility in direct sunlight.

Performance

FeatureSamsung Galaxy A02sSamsung Galaxy S21 5GPractical Impact
ChipsetQualcomm SDM450 Snapdragon 450 (14 nm)Exynos 2100 (5 nm) - InternationalS21 5G’s chipset is significantly more powerful, leading to faster app loading, smoother multitasking, and better gaming performance.
AnTuTu Score74,800749,100S21 5G offers a much higher performance, resulting in a faster and smoother user experience.
GPUAdreno 506Mali-G78 MP14 - InternationalS21 5G's GPU is much more powerful, providing a better experience for graphically intensive tasks, like gaming and video editing

Battery

FeatureSamsung Galaxy A02sSamsung Galaxy S21 5GPractical Impact
Capacity5000mAh4000mAhA02s has a larger battery, potentially offering longer battery life. However, real-world battery life can vary depending on usage
Charging15W fast charging25W fast chargingS21 5G charges faster, reducing the amount of time spent plugged into a charger.
FeaturesNon-removableReverse charging, Wireless charging 15W, Reverse wireless charging 4.5W, Non-removable, No charger in-boxS21 5G offers convenient wireless charging capabilities and the ability to charge other devices wirelessly. No charger in box is a downside for users who don't have a compatible charger.

Camera

FeatureSamsung Galaxy A02sSamsung Galaxy S21 5GPractical Impact
Main Camera13MP, f/1.812MP, f/1.8, 1/1.76" sensor, Sony IMX555, 1.80 µm pixel sizeS21 5G has a larger sensor with larger pixels, likely capturing better images in low light despite lower megapixels.
TelephotoNot Available64MP, f/2.0, 1/1.72" sensor, Samsung Bright S5KGW2, 0.80 µm pixel sizeS21 5G has a telephoto lens, which allows for optical zoom, leading to clearer pictures when zoomed in.
Selfie Camera5MP, f/2.210MP, f/2.2, 1/3.2" sensor, Sony IMX374, 1.22 µm pixel sizeS21 5G has higher resolution and a larger sensor, leading to better quality selfies.
Portrait Mode (depth)2MP, f/2.4Not AvailableA02s has a dedicated depth sensor which may improve portrait mode.
Macro Lens2MP, f/2.4Not AvailableA02s offers a dedicated macro lens for extreme close-up shots.
Wide Angle + MacroNot Available12.2MP, f/2.2, 1/2.55" sensor, Sony IMX563, 1.40 µm pixel sizeS21 5G offers a dedicated wide angle lens and macro lens for better versatility
Video1080p@30fps8K@24fps, 4K@60fps, 1080p@240fpsS21 5G offers much higher video resolution, frame rates and slow motion. It also has video stabilization and stereo sound.
DXOMark (Mobile)Not TestedMain: 111 (Photo: 118, Video: 90)S21 5G has a tested and verified good camera experience for both photos and videos.
DXOMark (Selfie)Not TestedMain: 132 (Photo: 125, Video: 145)S21 5G has a tested and verified excellent selfie camera experience for both photos and videos.
Camera FeaturesDigital zoom, Triple camera, Autofocus, Touch focus, PDAF, Geotagging, Panorama, HDR, Face detection, ISO settings, Scene mode, Self-timer4K Video, 8K Video, Digital zoom, Optical zoom, Triple camera, Digital image stabilization, OIS, Autofocus, Touch focus, Continuous autofocus, Manual focus, PDAF, Continuous shooting, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timer, RAW, Night ModeS21 5G offers more advanced camera features, including optical zoom, OIS, and RAW capture, leading to more creative and high-quality photos and videos.

2. Key Differences Analysis

Samsung Galaxy A02s Advantages:

  • Larger Battery: The 5000mAh battery potentially offers longer battery life.
  • Dedicated Macro and Depth Sensors: These provide more options for creative close-up and portrait photography.
  • Lower Price: Likely to be much more affordable than the S21 5G.

Samsung Galaxy S21 5G Advantages:

  • Superior Display: AMOLED, higher resolution, 120Hz refresh rate, and much higher brightness make it significantly better for viewing content.
  • Significantly Higher Performance: The Exynos 2100 chipset and more RAM provide a much smoother and faster user experience.
  • Superior Camera System: Offers optical zoom, better low-light performance, and advanced video recording capabilities including 8K.
  • Faster Charging and Wireless Charging: Provides convenience and faster charging times.
  • Better Build Quality: Corning Gorilla Glass Victus on the screen offers superior protection.
  • Better Connectivity: Supports newer Wi-Fi and Bluetooth standards.
  • Enhanced Audio: Includes Dolby Atmos, stereo speakers, and a noise cancellation microphone.

Trade-offs

  • A02s: Trades off performance, display quality, camera features for a lower price and slightly better battery capacity.
  • S21 5G: Higher price tag and less battery capacity.

3. User Profiles & Recommendations

Samsung Galaxy A02s: Ideal Users

  • Budget-conscious buyers: Users who need a basic smartphone for essential tasks at a lower price.
  • Users prioritizing battery life: Those who need a phone that can last through a full day with heavy usage without needing to be recharged frequently.
  • Basic phone users: Users who don't require high performance or advanced features and want larger display.

Use Cases:

  • Making calls, sending text messages, and basic web browsing.
  • Casual media consumption.
  • Use as a secondary device with long battery life.
  • Users who need basic macro and depth of field functionality in their cameras

Samsung Galaxy S21 5G: Ideal Users

  • Performance enthusiasts: Users who require a fast and smooth phone for demanding tasks like gaming and multitasking.
  • Photography lovers: Users who want a high-quality camera system with advanced features.
  • Multimedia consumers: Users who appreciate a high-quality display for watching videos and playing games.
  • Users who value the latest tech: Users who want cutting-edge features and capabilities.

Use Cases:

  • Gaming and resource-intensive applications.
  • Professional photography and videography.
  • High-quality media consumption (videos, games)
  • Users who value fast, seamless user experience

Price-to-Value Ratio

  • A02s: Offers decent value for its low price, suitable for basic smartphone needs.
  • S21 5G: Offers a very high value for the features and capabilities it provides. Justifies a premium price for higher performance, better camera, and superior display.

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The S21 5G will be significantly more expensive.
  2. How important is performance? If you want a fast and smooth experience, the S21 5G is the clear choice.
  3. How important is display and camera quality? The S21 5G offers a vastly superior experience in both aspects.

Scenario-Based Recommendations:

  • Budget-Conscious Buyer: If your budget is very limited and you need a basic phone with long battery life for essential tasks, the A02s would be the better option.
  • Performance-Oriented User: If you value fast performance, gaming, and high-quality media consumption and aren't on a strict budget, the S21 5G is the clear winner.
  • Photography Enthusiast: If a high-quality camera with zoom capabilities and superior video recording is essential, the S21 5G is the only option.
  • Everyday User: If you want a good quality phone that can last you a while, it is recommended to go for the S21. While it's more expensive, the improved specs make it a more future proofed device.

My Choice and Explanation

I would choose the Samsung Galaxy S21 5G.

Here's why:

  • Performance: The vast difference in performance between the Snapdragon 450 and the Exynos 2100 is a deal-breaker for me. I use my phone for various tasks, including gaming and multitasking, and the S21 5G will provide a much smoother experience.
  • Display Quality: The AMOLED display with a 120Hz refresh rate and high brightness is significantly more enjoyable to use than the PLS LCD panel on the A02s. The visual experience is much more vibrant and sharp, which is essential for media consumption and gaming.
  • Camera Capabilities: I value the ability to capture high-quality photos and videos, and the S21 5G's camera system, with its telephoto lens, OIS, and 8K video, is far superior to the A02s's camera.
  • Features: Features like wireless charging, faster charging, and enhanced audio are conveniences I would prefer over the slightly larger battery capacity of the A02s. The better build quality also means the device will be more durable over time.
  • Longevity: Given the superior processor, display, camera, and build quality, the S21 5G will offer a more satisfying long-term user experience, making it a more worthwhile investment in the long run. It is also far more future-proof than the A02s, which will likely be obsolete sooner.
  • Value for money: While more expensive, the S21 provides the best value for money. The difference in user experience will be noticeably higher, and the device should last you longer.

While the A02s has a larger battery and a more affordable price, the S21 5G offers a far better user experience in all other aspects, which is more valuable for my needs.

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.

Key Strengths:

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