
Compare models
Galaxy A04S Vs Galaxy S21 5G
- 1-year minimum warranty
- Free delivery on all items
- Free 30-day returns
Differences at a glance
The Samsung Galaxy A04S, released in late 2022, and the Samsung Galaxy S21 5G, launched in early 2021, represent two distinct approaches to the modern smartphone experience. While the Galaxy A04S focuses on providing essential utility and long-lasting battery life for everyday tasks, the Galaxy S21 5G was designed as a high-performance flagship with advanced photography and display technology. Both devices operate on the Android ecosystem, though they offer different software experiences based on their internal capabilities and original release targets.
The primary differentiator between these two models lies in their intended use cases: one prioritises endurance and simplicity, while the other focuses on speed and multimedia quality. In 2026, both remain viable options for different types of users, from those seeking a basic communication tool to those requiring a more robust mobile workstation.
Available Models
Colour
Storage (GB)
Scores
Durability
When evaluating how long these devices will remain functional and secure, the Galaxy S21 5G benefits from a more extensive software support history despite being the older model.
- Software Longevity: The Galaxy S21 5G was launched with a commitment to multiple generations of Android updates, ensuring it remains compatible with modern apps and security protocols well into 2026. The Galaxy A04S, as an entry-level device, typically receives fewer major system upgrades over its lifespan.
- Build Resilience: The Galaxy S21 5G features a more robust construction with formal water and dust resistance ratings, protecting it against environmental damage. The Galaxy A04S uses a practical plastic build that is durable against physical impact but lacks the same level of moisture protection.
- Repair Access: Both smartphones are widely supported by repair networks, though the Galaxy A04S features a more traditional internal layout that can sometimes simplify basic component replacements for technicians.
Year of Release
2022
2021
Compatible with latest Update
Yes
Yes
OS
Android
Android
Foldable
No
No
Performance
The difference in responsiveness between these two devices is most noticeable when handling demanding applications or switching between multiple tasks simultaneously.
- System Responsiveness: The Galaxy S21 5G handles high-definition video editing and intensive gaming with ease, ensuring a fluid experience without lag. The Galaxy A04S is optimised for efficiency during basic browsing, messaging, and social media use.
- Battery Endurance: The Galaxy A04S carries a larger battery capacity which, combined with its efficient internal components, allows it to last through two full days of light use. The Galaxy S21 5G requires more frequent charging, especially when utilising its high-performance features.
- Multitasking Capability: With more memory dedicated to active tasks, the Galaxy S21 5G keeps background applications ready for instant access. The Galaxy A04S may need to reload apps more frequently when navigating between different tools.
Screen quality
The visual experience differs significantly between these models, primarily due to the underlying panel technology and how smoothly motion is rendered on the display.
- Display Technology: The Galaxy S21 5G uses an advanced AMOLED screen that produces deep blacks and vibrant colours, making it well-suited for media consumption. The Galaxy A04S uses a standard LCD panel which is clear and functional but offers less contrast.
- Motion Smoothness: While both screens offer higher-than-standard refresh rates, the Galaxy S21 5G provides a more fluid scrolling experience that can adapt to the content on screen. The Galaxy A04S maintains a consistent but slightly less fluid motion during navigation.
- Outdoor Visibility: The Galaxy S21 5G can reach higher brightness levels, ensuring the screen remains legible even under direct sunlight, whereas the Galaxy A04S is better suited for indoor or shaded environments.
Resolution
720 x 1600
1080 x 2400
Screen type
PLS LCD
Dynamic AMOLED 2X
Audiovisual
Photography and media playback are areas where the flagship heritage of the Galaxy S21 5G is most apparent, though the Galaxy A04S offers a capable main sensor for everyday snapshots.
- Camera Versatility: The Galaxy S21 5G features a triple-lens system including a dedicated zoom lens and an ultra-wide lens for creative framing. The Galaxy A04S focuses on a high-resolution main sensor that performs well in bright daylight conditions.
- Video and Audio: Recording video on the Galaxy S21 5G results in higher detail and better stabilisation, complemented by stereo speakers for an immersive soundstage. The Galaxy A04S provides a single speaker and standard video recording suitable for social sharing.
- Low-Light Performance: The Galaxy S21 5G utilises advanced processing to capture clear images in dark settings, while the Galaxy A04S requires more ambient light to produce sharp, noise-free photographs.
Main camera
50 megapixels
12 megapixels
Front camera
5 megapixels
10 megapixels
Miscellaneous
Beyond the core specifications, the physical design and connectivity options define how these phones fit into a user's daily lifestyle and accessory ecosystem.
- Connectivity Standards: The Galaxy S21 5G supports high-speed mobile networks, providing faster data speeds in covered areas. The Galaxy A04S is limited to standard 4G networks, which remain reliable for general web use and streaming.
- Physical Ports: The Galaxy A04S includes a traditional headphone jack and a slot for expandable storage, features that are absent on the Galaxy S21 5G. This makes the A04S more flexible for users with wired accessories or large local media libraries.
- Security Features: The Galaxy S21 5G uses a sophisticated sensor hidden beneath the glass for secure access, while the Galaxy A04S integrates a reliable fingerprint scanner into the power button on the side of the frame.
Weight
195 g
169 g
Screen size (in)
6.5
6.2
Mobile network
4G
5G
SIM card
Dual Physical SIM
Dual Physical SIM + eSIM
Carrier compatibility
Unlocked
Unlocked
What the community thinks
User feedback from various tech communities highlights that the Galaxy S21 5G remains a popular choice for those who appreciate a compact, powerful device with a versatile camera system. However, some users note that its battery life can be a limiting factor during long days of heavy use. Conversely, the Galaxy A04S is frequently praised for its exceptional battery longevity and the inclusion of a headphone jack, though users acknowledge its slower performance when handling complex applications.
Users who prioritise high-quality photography, smooth gaming, and a vibrant display will find the Galaxy S21 5G aligns better with their needs. This model is particularly well-suited for professionals and content creators who require a responsive tool for their daily workflow. On the other hand, users who primarily use their phone for calls, messaging, and social media, and who value not having to charge their device every day, may prefer the Galaxy A04S. It is a practical choice for students or as a secondary device for travel.
Choosing a quality-assured refurbished option for either of these models is a sustainable choice that reduces electronic waste while providing a reliable smartphone experience. Both devices remain functional and capable in 2026, and opting for an eco-friendly alternative ensures these electronics continue to serve a purpose without the need for new manufacturing resources. Ultimately, the decision depends on whether you value flagship performance or long-lasting utility.












