The Samsung Galaxy A51 is a discontinued mid-range Android phone from late 2019 that still has a clear identity: a slim body, a sharp Super AMOLED display, expandable storage, LTE connectivity, and a camera system that was ambitious for its class.
This specs-focused overview looks at the Galaxy A51 from a practical current-buyer angle, especially for readers comparing used, refurbished, or budget replacement phones where screen quality, software limits, battery condition, and network support matter more than launch hype.
Full Specifications
Network
| Technology | GSM / HSPA / LTE |
| 2G bands | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 |
| HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66 |
| 2, 4, 5, 12, 13, 25, 26, 41, 66, 71 – SM-A515U | |
| Speed | HSPA, LTE |
Launch
| Announced | 2019, December 12. Released 2019, December 16 |
| Status | Discontinued |
Body
| Dimensions | 158.5 x 73.6 x 7.9 mm (6.24 x 2.90 x 0.31 in) |
| Weight | 172 g (6.07 oz) |
| Build | Glass front (Gorilla Glass 3), plastic back, plastic frame |
| SIM | · Nano-SIM· Nano-SIM + Nano-SIM |
Display
| Type | Super AMOLED |
| Size | 6.5 inches, 102.0 cm2 (~87.4% screen-to-body ratio) |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) |
| Protection | Corning Gorilla Glass 3 |
Platform
| OS | Android 10, upgradable to Android 13, One UI 5 |
| Chipset | Exynos 9611 (10 nm) |
| CPU | Octa-core (4×2.3 GHz Cortex-A73 & 4×1.7 GHz Cortex-A53) |
| GPU | Mali-G72 MP3 |
Memory
| Card slot | microSDXC (dedicated slot) |
| Internal | 64GB 4GB RAM, 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM, 256GB 8GB RAM |
| UFS 2.0 |
Main Camera
| Quad | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 12 MP, f/2.2, 123˚ (ultrawide) 5 MP (macro) Auxiliary lens |
| Features | LED flash, panorama, HDR |
| Video | 4K@30fps, 1080p@30/120fps; gyro-EIS |
Selfie camera
| Single | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm |
| Features | HDR |
| Video | 4K@30fps, 1080p@30fps |
Sound
| Loudspeaker | Yes |
| 3.5mm jack | Yes |
Comms
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Bluetooth | 5.0, A2DP, LE |
| Positioning | GPS, GLONASS, GALILEO, BDS |
| NFC | Yes |
| Radio | FM radio |
| USB | USB Type-C 2.0, OTG |
Features
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, compass |
| Virtual proximity sensing ANT+ |
Battery
| Type | Li-Po 4000 mAh, non-removable |
| Charging | 15W wired |
Misc
| Colors | Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink |
| Models | SM-A515F, SM-A515F/DSN, SM-A515F/DS, SM-A515F/DST, SM-A515F/DSM, SM-A515F/N, SM-A515U, SM-A515U1, SM-A515W, SM-A515X, SM-S515DL |
| SAR | 0.80 W/kg (head) 0.67 W/kg (body) |
| SAR EU | 0.37 W/kg (head) 1.59 W/kg (body) |
| Price | About 100 EUR |
Our Tests
| Performance | AnTuTu: 113051 (v7), 175363 (v8) GeekBench: 5401 (v4.4), 1294 (v5.1) GFXBench: 5.6fps (ES 3.1 onscreen) |
| Display | 636 nits max brightness (measured) |
| Camera | Photo / Video |
| Loudspeaker | -28.6 LUFS (Average) |
| Audio quality | Noise -93.1dB / Crosstalk -87.3dB |
| Battery (old) | Endurance rating 86h |
Price and Availability
The Samsung Galaxy A51 offers a compelling combination of features and performance. While the base price is around €100, the actual cost may vary depending on your location and retailer. Below, you’ll find the approximate price of the Samsung Galaxy A51 converted into various currencies. Please note that these are estimates based on recent exchange rates as of September 13, 2026 and may not reflect the exact price you’ll find at a retailer.
- United States: $116
- Japan: ¥17,848
- United Kingdom: £86
- Australia: A$162
- Canada: C$161
- Taiwan: NT$3,667
- Denmark: kr747
- Saudi Arabia: ﷼435
- South Korea: ₩155,972
- Germany: €100
- Brazil: R$592
- Vietnam: ₫3.005.208
- Kenya: KSh 15,048
- India: ₹11,084
- Indonesia: Rp 2.039.519
- Nigeria: ₦158,211
- Pakistan: ₨32,236
- Philippines: ₱7,268
- Bangladesh: ৳১৪,৩০৭
Value in 2026
The Galaxy A51 now sits in the older-budget segment, so its value depends heavily on condition, battery health, storage variant, and regional LTE compatibility. It is not a modern performance phone, and it does not include 5G, but it can still make sense for buyers who want a recognizable Samsung interface, a bright OLED panel, NFC, USB-C, a headphone jack, and microSD expansion without chasing flagship hardware.
The strongest value argument is balance. Many cheap phones use weaker displays, omit NFC, or cut storage flexibility. The A51 keeps several quality-of-life features together in one lightweight package. The weaker side is long-term support and speed: the Exynos 9611 was mid-range even at launch, and app expectations have moved on since 2019.
Design and Build
At 158.5 x 73.6 x 7.9 mm and 172 g, the Galaxy A51 remains easy to handle for a 6.5-inch phone. The thin profile and moderate weight are part of its appeal, especially compared with newer budget phones that often feel thicker because of larger batteries. The body uses a Gorilla Glass 3 front with a plastic back and plastic frame, so it should be treated as a lightweight practical build rather than a premium glass-and-metal design.
The Prism Crush color options give the phone a more distinctive look than many plain entry-level devices. The in-display optical fingerprint sensor also helps the A51 feel more modern than rear-mounted scanner designs, though older optical sensors can be slower than current side-mounted or ultrasonic alternatives.
Display Quality
The display is the Galaxy A51’s headline strength. The 6.5-inch Super AMOLED panel has a 1080 x 2400 resolution, a tall 20:9 aspect ratio, and about 405 ppi density, which is still sharp for reading, streaming, and everyday use. Samsung’s official specifications list the A51 with a 6.5-inch FHD+ Super AMOLED display, and measured reviews have generally treated the panel as one of the device’s best features.
The source test data lists 636 nits maximum measured brightness, while independent measurements vary by method. In real use, the important point is that this screen should feel more vivid and contrast-rich than most LCD-based budget phones. Buyers who watch video, browse photos, or read often may find the display a better reason to choose the A51 than the processor or charging speed.
Performance and Storage
The Galaxy A51 runs on Samsung’s Exynos 9611 chipset with an octa-core CPU and Mali-G72 MP3 graphics. It is suitable for messaging, web browsing, maps, social apps, email, and media playback, but it is not a strong choice for heavy gaming or long multitasking sessions. The source performance scores, including AnTuTu v8 around 175k and GeekBench 5.1 around 1294, underline its older mid-range position.
Storage flexibility is a more positive story. The phone was offered in multiple RAM and storage versions, from 64GB configurations to 256GB variants, and it includes a dedicated microSDXC slot. That dedicated card slot matters for budget buyers because it allows local music, offline video, photos, and documents without sacrificing a SIM slot on supported dual-SIM models.
Camera Use
The rear camera setup is led by a 48 MP wide camera with PDAF, supported by a 12 MP ultrawide camera, a 5 MP macro camera, and an auxiliary sensor. The combination is useful in good light because it gives the phone more framing options than a simple single-camera budget device. The 123-degree ultrawide camera is especially useful for travel scenes, interiors, and group shots.
Video support is also respectable for the class, with 4K recording at 30 fps and 1080p modes including high-frame-rate capture. Gyro-EIS support helps, but expectations should stay realistic: newer phones have better processing, stronger night modes, and more stable video pipelines. The 32 MP selfie camera is a useful advantage for video calls and social photos, with 4K recording also listed for the front camera.
Battery and Charging
The 4000 mAh battery was mainstream for its generation and still looks reasonable on paper because the chipset and 60 Hz display are not power-hungry by modern standards. The source test data gives an old endurance rating of 86 hours, which suggests solid standby and mixed-use behavior when the battery is healthy.
The caution is age. A Galaxy A51 bought today is likely to have gone through several years of charging cycles unless the battery has been replaced. Charging is limited to 15W wired, so it is convenient enough for overnight charging but not fast by current standards. There is no mention of wireless charging in the supplied data, so buyers should not expect it.
Software Experience
The Galaxy A51 launched with Android 10 and is listed as upgradable to Android 13 with One UI 5. That is a useful ceiling for an older Samsung phone because One UI 5 still feels familiar to many current Samsung users and includes modern interface conventions, privacy controls, and app compatibility improvements compared with the launch software.
The limitation is future support. As a discontinued model, the A51 should be treated as a phone near or beyond the end of its mainstream update life, depending on region and carrier. For banking, work profiles, and security-sensitive use, buyers should check the exact software patch level before relying on it as a primary device.
Connectivity and Network
The Galaxy A51 supports GSM, HSPA, and LTE, with broad 4G band coverage in the supplied global list and a specific SM-A515U band set for the U.S. market. That makes model number important. A used imported unit may not support the same bands as a carrier-specific U.S. model, so buyers should match the model code against their operator before purchase.
Everyday connectivity is well rounded: dual-band Wi-Fi 802.11 a/b/g/n/ac, Bluetooth 5.0, GPS with multiple satellite systems, NFC, FM radio, USB Type-C 2.0 with OTG, ANT+, and a 3.5 mm headphone jack. That mix is one of the A51’s underrated advantages, especially for users who still want wired audio or contactless payments on a low-cost Samsung phone.
Who Should Buy It
The Galaxy A51 is best for light to moderate users who prioritize display quality, expandable storage, Samsung’s interface, and familiar hardware features over speed. It can be a sensible secondary phone, student phone, media device, travel backup, or low-cost replacement if the battery is healthy and the price is right.
It is not the best fit for buyers who need 5G, long future updates, demanding gaming, fast charging, or flagship-grade camera processing. In direct comparison with newer budget phones, the A51’s strongest argument is not raw performance; it is the combination of OLED display, slim design, microSD, NFC, and headphone jack.
References
- Samsung official Galaxy A51 support and specifications
- Samsung News U.S. Galaxy A Series launch information
- Notebookcheck Samsung Galaxy A51 review and measurements
- PhoneArena Samsung Galaxy A51 review
- Source catalog data for Samsung Galaxy A51
Conclusion
The Samsung Galaxy A51 remains appealing when judged as an affordable used LTE phone with a sharp Super AMOLED screen, expandable storage, NFC, a headphone jack, and a versatile camera layout. Its processor, update outlook, and 15W charging are the main compromises. Buy it only in good condition, with the right model for your network, and preferably with a healthy or replaced battery.
