Everyone assumes Samsung’s cheap Galaxy A phones are easy recommendations – they’re not.
The Galaxy A21 and Galaxy A21s look great on a carrier shelf: giant 6.5-inch displays, Samsung logo, multiple cameras, and sub-$250 pricing. But once you get past the spec stickers and start living with these phones, the trade‑offs become very obvious.
I’m cautiously optimistic about what Samsung’s doing here – big batteries and modern designs in the budget tier are good news. But between display compromises, sluggish silicon, and some shameless camera padding, these are very context-dependent buys.
Big Screens, Small Resolution
Both the Galaxy A21 and A21s are built around the same headline feature: a large 6.5-inch display with a punch‑hole selfie camera in the top left and rounded corners.
On paper, that sounds very modern for the price. In practice, the panels are doing the absolute minimum to hit the size target.
The A21 uses a 6.5-inch 720p IPS LCD. That shakes out to about 270ppi, which is borderline at this size. Text and icons are usable, but you lose the crispness you’d get from a 1080p panel. Samsung’s own description calls it vivid, but 720p on a screen this big is “fine” at best.
The Galaxy A21s sticks to the same 6.5-inch size and 1600 x 720 resolution, but swaps in a PLS TFT LCD. Again, we’re talking about roughly 270ppi. For the budget class, 720p is common, and you’re unlikely to see obvious pixelation in casual use. Still, this is a big canvas with not a lot of pixels.
Brightness is a mixed bag. Lab measurements on the A21s show 408 nits max in manual mode and up to 491 nits in auto. That’s serviceable for indoor use and just about acceptable outdoors, but nowhere near comfortable in bright sun. Samsung’s own comparison points out that a rival like the Redmi 9 can be even dimmer, which tells you how low the bar is here.
So yes, these are large, modern‑looking displays. Just don’t expect flagship sharpness or outdoor visibility miracles.
Color Accuracy: Samsung’s Usual Strength, Not Here
Samsung normally aces display tuning, even on cheaper OLED phones. The Galaxy A21s LCD is a reminder that not every Samsung panel is a home run.
In lab tests, the A21s screen shows consistently off color reproduction with no user-tunable contrast or color profiles. It targets the sRGB gamut but misses by a wide margin, with an average deltaE of 6.8 and a maximum of 10.5.
Translation: whites and grays lean noticeably blue, other colors are muted, and the overall picture tends to look washed out. If you’re used to saturated Samsung OLEDs, this will feel like a downgrade.
There are also physical LCD quirks. Around the punch‑hole camera, you’ll notice uneven backlight – a faint shadow that stands out especially on bright backgrounds. It’s a common LCD side effect, but still a reminder of where costs were cut.
Contrast sits around 1300:1 on the A21s, which is middle of the road for an LCD – neither terrible nor impressive. Minimum brightness dips to 4.8 nits, reasonable for bedtime reading but not especially gentle on the eyes.
The regular A21 doesn’t get a full calibration breakdown, but with the same resolution and LCD tech class, expectations should be similarly tempered. If you care about color accuracy or punchy contrast, these phones are only checking the “big” box, not the “great” box, on displays.
Performance: Basic Tasks Only
The standard Galaxy A21 is clearly built for people who don’t push their phones hard. It runs a Mediatek Helio P35 paired with 3GB of RAM and 32GB of storage (expandable via microSD).
No surprise: this combination isn’t snappy. Multitasking is a slog, and heavier apps often take a couple of extra beats to open. The phone can run simpler games like Mario Kart Tour acceptably, but more demanding titles such as Asphalt 9: Legends visibly strain the hardware.
Samsung’s One UI over Android 10 is familiar and generally functional. Samsung’s stock apps lack some of Google’s design polish, and the settings menus can feel scattered, but there’s nothing in the software itself that ruins the experience.
The real problem is bloat. The Boost Mobile A21 variant comes drowned in preinstalled junk: Facebook, multiple Amazon and Microsoft apps, two weather apps, four different music streaming services, plus carrier add‑ons like a subscription “secure Wi‑Fi” tool that nags you with notifications. There’s no unlocked option to escape this, and it’s reasonable to assume other carriers are similarly aggressive.
On hardware this modest, every unnecessary app is another drag on performance. You can disable a lot of it, but it’s tedious, especially for a phone already on the edge of acceptable speed.
We don’t get deep performance details for the A21s, just that it aims squarely at the budget tier. Given how average its display and other hardware are, no one should expect flagship‑class responsiveness here either.
Battery Life: Where the A Series Actually Shines
Battery is where both the A21 and A21s start to redeem themselves.
The Galaxy A21 packs a 4,000mAh battery, paired with that 720p LCD and modest Helio P35. In real-world mixed use, it can comfortably stretch past two days: around five and a half hours of screen‑on time across a couple of days that included gaming, video streaming over Wi‑Fi and 4G, camera use, and about nine hours idling overnight.
The formula is simple and effective: big battery + low‑resolution screen + low‑power chip = long life.
The Galaxy A21s goes even further with a 5,000mAh Li‑Po cell and 15W charging. Don’t let the “quick charge” label fool you, though – in testing, the bundled 15W charger only got the battery from dead to about 26% in 30 minutes. That’s slow for 5,000mAh territory.
Endurance, however, is legit. The A21s posted an endurance score of 119 hours in lab testing, with strong results in talk time, web browsing, video playback, and solid standby performance. The testing setup simulates one hour of calling, one hour of web browsing, and one hour of video per day.
If you want a phone that you basically never have to panic‑charge, both devices are compelling. They feel more like “charge every couple of days” tools than “top up at lunch” liabilities.
Speakers, Audio, and Everyday Use
Audio hardware is straightforward.
Both phones use a single bottom‑firing speaker. On the A21, it’s placed to the left of the USB‑C port, making it easy to cover with your hand in landscape. Sound is better than you might expect at this price – not as tinny as many budget rivals – but volume is limited.
The A21s speaker measures only “Average” in loudness, and in real use everything sounds quiet, from games to videos and music. On the positive side, mid‑tones and bass are tuned reasonably well for a single driver, so what you hear is at least balanced.
The A21 still has a 3.5mm headphone jack, which matters a lot more in this price bracket than in the flagship world. Wired audio quality testing has largely been discontinued by labs because most modern phones do a fine job, and there’s nothing here to suggest Samsung is an exception.
Physically, the A21 is huge – taller and wider than a Galaxy S20 Ultra, though a bit thinner. The bezels are present but not offensive, and the punch‑hole selfie camera looks modern. The rear-mounted fingerprint sensor and volume keys are placed awkwardly high on the frame, which makes adjustments and unlocking uncomfortable unless you have long fingers.
The plastic back is glossy and reflective, which means two things: it shows fingerprints constantly and it scratches easily. There’s no case in the box, just a 12W brick and USB‑A‑to‑C cable, so you’ll want to budget for protection.
Cameras: One Decent Sensor, Three Afterthoughts
Samsung’s marketing on the Galaxy A21 loves the phrase “quad camera,” but the reality is harsh.
The phone’s rear setup is:
– 16.1MP f/1.8 primary camera
– 8MP f/2.2 ultrawide
– 2MP f/2.4 macro
– 2MP f/2.4 depth sensor
The last two are basically padding. The 2MP macro produces soft, color‑skewed images even in ideal lighting. You’re usually better off taking a normal photo with the main camera and cropping in. The depth sensor exists mostly for spec sheets.
This isn’t unique to Samsung – a lot of manufacturers in this price segment add low‑effort macro and depth sensors just to claim “quad camera” status. It’s still disappointing.
The primary and ultrawide cameras, on the other hand, are serviceable for the price. In good light, you can get acceptable shots that look fine on social media. Once you move into challenging scenes, the system falls apart.
High dynamic range scenarios routinely show either blown-out highlights or crushed shadows. There’s little middle ground. Low light photography is basically a non‑starter: noisy, blurry, and muddy images are the norm.
If your expectations match the price – casual daytime snapshots, nothing more – you won’t be horrified. Just don’t expect any Pixel 4a‑style magic.
The A21s camera section in the lab material focuses only on speaker and display behavior, not the image pipeline, so we don’t get comparable detail there. Given its positioning, it’s safe to view it in the same league: basic, not a photography showcase.
Who Should Actually Buy These?
For the Galaxy A21, the recommendation is extremely narrow.
If you want a very large phone, you’re tied to a carrier, your budget caps around $250, and you mainly do light tasks – messaging, browsing, video streaming – the A21 is serviceable. You get long battery life, modern One UI, a headphone jack, and a big display.
You also get compromises: sluggish performance, a low‑resolution screen that struggles outdoors, mediocre cameras padded with useless sensors, tons of carrier bloat, and a plastic body that looks grubby fast.
The A21s tells a similar story: a large 6.5-inch screen, big 5,000mAh battery with excellent endurance, a single quiet but decently tuned speaker, and an LCD panel whose colors and brightness clearly reveal its budget nature.
The cautiously optimistic angle here is this: Samsung is finally dragging long battery life and modern design language into the low end, but it’s doing so by cutting just about everything else to the bone. For the right buyer, that trade‑off works. For anyone even slightly more demanding, used and refurbished higher‑end phones are still the smarter play.
If your carrier is dangling aggressive promos on the A21 or A21s and you know your priorities – battery life and screen size over everything – you could do worse. Just don’t walk in thinking “Samsung = safe bet” without reading the fine print.
Check back soon as this story develops.