The Galaxy A21s is Samsung's lower-tier offering that pairs a large 6.5-inch 1600×720 display with an Exynos 850 SoC, a 48MP main sensor inside a quad-camera array, and Android 10. It was positioned for buyers who prioritise battery life and a big screen over raw speed, and it ships in multiple RAM configurations (3GB / 4GB / 6GB) with 32GB or 64GB of storage. Those spec highlights make its role clear: a budget daily driver rather than a performance handset.
This review is based on published benchmark aggregates and reviews: UL Benchmarks (3DMark Wild Life results and stability notes), AnTuTu listings (125,160 median reported), NanoReview summary scores for performance, gaming and battery, and GSMArena's hands-on summary noting the large screen, quad-camera and very high endurance rating. Where applicable I reference median user-submitted scores and the caveats UL provides about variability in user benchmarking.
High-level verdict: the A21s delivers a large display, flexible RAM options up to 6GB and a 48MP main camera with notably strong battery endurance. However, its Exynos 850 chipset keeps GPU-bound workloads sluggish (3DMark Wild Life ~425 / ~2 FPS) and the 1600×720 resolution on a 6.5-inch panel produces a low pixel density. It also ships with Android 10 and base storage is limited to 32GB, which reduces future-proofing compared with newer budget models.
Performance is modest — adequate for apps, poor for 3D gaming
Benchmarks place the A21s in the budget class: AnTuTu median results reported around 125,160 and UL 3DMark Wild Life scores near 425–428, producing roughly 2 frames per second in the Wild Life graphics test. NanoReview summarises performance and gaming in the high teens (performance 19, gaming 17), which aligns with real-world snappiness for basic apps but not for demanding 3D titles.
UL's Wild Life stability is high at 98%, which indicates the Exynos 850 sustains its modest performance without large throttling swings, but sustained GPU-limited workloads will still run at low frame rates. Expect smooth UI navigation and light multitasking on 3GB–6GB RAM configurations, but limited headroom for modern mobile games.
6.5-inch HD+ display gives size but not sharpness
The A21s uses a 6.5-inch display with a 1600×720 (HD+) resolution. That provides a large viewing surface, but the pixel count results in a low pixel density compared with FHD+ competitors; text and fine details will look softer, especially at closer viewing distances.
GSMArena and aggregated reviews note the large screen as a positive for media and reading, but the combination of size and 1600×720 resolution is a trade-off: more screen real estate at the cost of clarity. The phone's overall design and screen size suit users who prioritise battery life and legibility over pixel-level sharpness.
48MP main sensor in a quad-camera pack — capable but not class-leading
Samsung equips the A21s with a 48MP main camera as part of a quad-camera module (GSMArena notes the 'very good quad-camera' configuration). The 48MP spec gives marketing-friendly resolution, and in well-lit conditions it can deliver detailed images for social sharing and casual use.
Published sources do not provide extensive lab-grade image-quality scores in the brief, so while the 48MP sensor is a practical advantage over lower-resolution rivals, the phone remains a budget camera solution rather than a flagship-grade shooter.
Battery endurance is one of the A21s' strongest points
Multiple reviews and aggregated scoring point to strong battery life: NanoReview's battery score is 73 and GSMArena reports a 'very high endurance rating', reflecting long real-world runtimes. UL Benchmarks also note that public battery results vary with screen brightness and that user-submitted medians can differ from controlled lab tests.
UL recommends calibrating brightness to 200 cd/m² for consistent battery testing; variability in user behaviour explains the range of reported runtimes. If battery life is your priority, the A21s consistently ranks above similarly priced phones on endurance metrics cited by reviewers.
Ships with Android 10 and limited base storage
The A21s ships with Android 10 (briefed sources list Android 10 as the OS). In the context of 2026 and current Android releases, Android 10 is dated and may affect platform feature parity and security update cadence compared with newer models.
Memory and storage options are factual and straightforward: RAM choices of 3GB, 4GB and 6GB (listed as 3072 / 4096 / 6144 MB) and storage options of 32GB or 64GB. Base 32GB storage is tight for users who capture a lot of photos or install many apps, so the 64GB variant or adding external storage are practical considerations.
Pros & Cons
- ✅ Large 6.5-inch display (useful for media and reading)
- ✅ 48MP main camera as part of a quad-camera array
- ✅ Battery endurance rated 'very high' by GSMArena and scored 73 on NanoReview
- ✅ Multiple RAM options (3GB / 4GB / 6GB) to match basic multitasking needs
- ✅ 3DMark Wild Life stability 98% indicates consistent throttling behaviour
- ❌ Low screen resolution (1600×720) on a 6.5-inch panel yields low pixel density
- ❌ Modest SoC performance: AnTuTu ~125,160 and 3DMark Wild Life ~425 (~2 FPS) — poor for 3D gaming
- ❌ Ships with Android 10, which is outdated compared with modern budget rivals
- ❌ Base storage limited to 32GB on entry models
How It Compares to the Competition
- Samsung Galaxy A13 4G — Similar mid/budget positioning with comparable AnTuTu-range scores listed alongside the A21s in aggregated rankings, but check software and display differences when choosing.
- Samsung Galaxy A12 — Another budget Samsung with comparable feature set; A12 and A21s trade-offs include camera and battery emphasis vs. raw performance.
- Motorola Moto G22 — Appears in the same AnTuTu comparison lists as peers — consider the Moto if you prioritise newer software builds or different display tuning.
- Infinix Hot 20 Play — Listed near the A21s in AnTuTu rankings and aimed at budget users; compare battery endurance and gaming performance for your priorities.
Who Should Buy This & Who Should Skip It
Buy it if: Buy the Galaxy A21s if you prioritise long battery endurance, a large 6.5-inch screen and a high-resolution 48MP main sensor in a low-cost Samsung package, and if you mainly use the phone for calls, web, social apps and media consumption rather than heavy gaming.
Skip it if: Skip the A21s if you need a sharp display, up-to-date Android releases, or sustained GPU performance for modern 3D games; buyers needing more storage or the latest software should look at newer budget models or competitors with higher-resolution screens and newer OS versions.
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