Samsung Galaxy A51 A515U 128GB Smartphone (Unlocked, Prism Crush Black)

Samsung Galaxy A51 A515U 128GB Smartphone (Unlocked, Prism Crush Black)
Key Features
  • GSM+CDMA / 4G LTE Compatible
  • North American Variant
  • Samsung Exynos 9611 Octa-Core Processor
  • 6.5" Super AMOLED Capacitive Touchscreen
With a 6.5" FHD+ widescreen display powered by Super AMOLED technology, the Samsung Galaxy A51 A515U 128GB Smartphone is a great choice for surfing the web, streaming video, playing games, capturing and viewing photos, and more. With its Infinity-O display and minimized bezels, this screen essentially stretches edge to edge to give you a true widescreen experience.
This device is unlocked and should work fully with carriers listed below with green bars. Yellow bars denote partial network coverage. A SIM card and service plan must be purchased separately. Network compatibility listed here is for reference only and does not guarantee phone compatibility or activation on CDMA Carriers.

True Know-How

Ask Our Experts


Samsung A51 Overview

  • 1Description
  • 2Android 10
  • 3GSM+CDMA / 4G LTE Wireless Connectivity
  • 4North American Variant / US Compatible LTE
  • 5Bixby
  • 6One UI 2
  • 7Interactive Diagnostics

With a 6.5" FHD+ widescreen display powered by Super AMOLED technology, the Samsung Galaxy A51 A515U 128GB Smartphone is a great choice for surfing the web, streaming video, playing games, capturing and viewing photos, and more. With its Infinity-O display and minimized bezels, this screen essentially stretches edge to edge to give you a true widescreen experience.

The A51 is equipped with a quad-camera system, so you can shoot with more perspective. Get ultrahigh resolution photos with its 48MP main camera for crisp and clear pictures day or night. Its 12MP ultrawide camera captures much more in the frame, so nothing is cut out while its 5MP macro camera takes high-res close-up photos. Its 5MP depth camera brings your subject into focus and reduces unwanted background noise from your images for a more professional look. Moreover, the A51's 32MP front-facing camera takes your selfies to a whole new level and gives you more clear and in-depth face pics.

Running Android 10 operating system, this phone is powered by a 2.3/1.7 GHz Samsung Exynos 9611 Octa-Core processor (4x 2.3 GHz Cortex A73, 4x 1.7 GHz Cortex A53) and 4GB of RAM. You get 128GB of built-in storage, which can be expanded via an (optional) microSD card up to 1TB in size. With its 4000mAh capacity battery, you can stream videos, play games, and browse the web all day, and if the battery starts running low, you can plug in and power up with 15W of fast charging power. Moreover, this smartphone is equipped with an under-display fingerprint sensor.

The A51 is unlocked and compatible with GSM+CDMA/4G LTE networks. Connect to the internet and other devices with built-in Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, and Bluetooth 5.0.

Android 10

The Android operating system is a personalized and customizable OS that allows you to add your favorite apps or widgets to your home screen and integrates heavily with Google's services. You can even download new themes using the Google Play Store, which offers access to millions of apps, games, books, music, movies, and more. Android 10 adds a wide variety of intelligent features, additional privacy controls, and other enhancements that make using your Android phone more enjoyable. Some features include Live Caption, which captions running videos, podcasts, and audio messages without the need for Wi-Fi or cellular data; Smart Reply, which suggests both responses to and actions for texts; and Family Link, which lets you manage apps, set screen time limits, and more.

GSM+CDMA / 4G LTE Wireless Connectivity

This phone is designed to work on select GSM and CDMA networks and is 4G LTE capable. LTE is an advanced cellular network data protocol capable of data speeds so fast that they compete with wired broadband Internet providers. With an LTE connection, this phone should have no problem streaming HD video, downloading apps, uploading photos, or anything else that requires a high-speed data connection. The phone is also backwards compatible with 3G and 2G data for instances when you can't get LTE. In addition to cellular wireless, this phone also features Bluetooth, NFC, and Wi-Fi connectivity.

Note: Not compatible with all cellular networks. Please make sure your provider uses a frequency or band that this phone supports, and that they will allow you to used carrier unlocked phones. You can check which bands this phone works within the Specifications.

North American Variant / US Compatible LTE

The A515U is a US variant of the Galaxy A51. It may be used in other parts of the world; however, LTE access may be limited or unsupported, depending on the network. Please choose your country/carrier above to confirm the network compatibility of this phone.


Customize Bixby Routines to accommodate the way you use your smartphone. You can reduce blue light and turn on night mode to get ready for bed or keep your A51 unlocked when you're in the car to get easy access. In addition, Bixby Vision is built right into your camera and can translate restaurant menus, scan items you're interested in, and more.

One UI 2

The Galaxy A51 is enabled with One UI 2, which helps everyday use feel seamless. You can navigate through any task and reduce the overload. One UI 2 gives you the tools to manage your smartphone use and focus on what's important in life. Track your usage, manage screen time, and even enable focus mode to help avoid distractions.

Interactive Diagnostics

Keep your Galaxy smartphone in tip-top shape with Samsung Members app. You can get automatic and interactive checkups, clean your memory and storage, and more. Additionally, you can reach out to the Samsung helpline to get extra assistance with any problems you find.
UPC: 887276410463

Samsung A51 Specs

Operating SystemAndroid 10
Memory4 GB
ProcessorSamsung Exynos 9611
CPU2.3 GHz Cortex A73 Quad-Core
1.7 GHz Cortex A53 Quad-Core
GPUMali G72 MP3
Storage128 GB
Native Resolution2400 x 1080
Refresh Rate60 Hz
Display Colors16.0 Million
Aspect Ratio20:9
Pixel Density405 ppi
Screen CoatingGorilla Glass 3
Input/Output Connectors
Ports1 x USB Type-C
1 x 3.5 mm Headphone
Flash Media Slot1 x microSDXC
SIM Card Slots1 x Nano SIM
GSM 2GGSM: 850, 900, 1800, 1900 MHz
CDMA 3GCDMA2000, EV-DO: 800, 1900 MHz
GSM 3G/3.5GHSPA+: 850, 900, 1700, 1900, 2100 MHz
4G LTELTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 20, 25, 26, 28, 29, 30, 38, 39, 41, 66, 71 Bands
Wi-FiYes, Wi-Fi 6 (802.11ax)
BluetoothBluetooth 5.0 + LE 
ANT+ SupportYes
FM RadioYes
Camera System
Camera SystemFront
32 MP 1/2.8" Sensor with a 26mm f/2.2 Lens
Standard: 48 MP 1/2" Sensor (0.8 µm Pixels) with a 26mm f/2.0 Lens
Ultra Wide: 12 MP Sensor (1.12 µm Pixels) with a 13mm f/2.2 Lens
Wide: 5 MP Sensor with a f/2.4 Lens
Depth Sensing: 5 MP 1/5" Sensor (1.12 µm Pixels) with a f/2.2 Lens
Camera FlashRear: 1 x LED
Focus TypeRear Wide: Phase-Detect Autofocus
Video RecordingFront
1080p at up to 30 fps
1080p at up to 30 fps
Biometric AuthenticationFingerprint
SensorsAccelerometer, Compass, Fingerprint, Gyroscope, Proximity
BatteryInternal Lithium-Ion (4000.0 mAh)
Wireless ChargingNone
Dimensions (W x H x D)2.9 x 6.2 x 0.3" / 7.4 x 15.7 x 0.8 cm
Weight6.1 oz / 173 g
Warranty LengthLimited 1-Year Warranty
USA Warranty ExtensionNone
Packaging Info
Package Weight0.72 lb
Box Dimensions (LxWxH)6.6 x 3.2 x 2"

Samsung A51 Reviews


Rated 5 out of 5
Date: 2021-01-12

best phone i've ever purchased and used. works seamlessly and smoothly

Good Value for the Price

By John
Rated 4 out of 5
Date: 2020-12-30

Was looking to replace my old Samsung S7 which its battery is dying. This is an excellent for its price. Migrated for a week. Other than some initial migration pain which I would get anyway, no complaint at all. I would recommend this phone to my friends and family.

A True Workhorse

By Robbie
Rated 5 out of 5
Date: 2020-12-28

this is by far the best purchase ever. this phone is a true work horse. does everything i've expected and more. i mean this phone handles several or more applications with ease. so flexible as well as responsive. the only downfall to this phone is the fingerprint option, it works when it wants to, but that's not a deal breaker to me. the phone is an absolute gem. thanks samsung, keep up the good work.

It's really amazing

By Hone
Rated 5 out of 5
Date: 2020-12-25

I bought 3. One for me one for my girl and one for my brother. We like the size and camera quality

Fast delivery

By Nishad
Rated 5 out of 5
Date: 2021-01-11

Good experience For buying product from B&H and deliver very fast Thanks

Samsung Galaxy A51 A515F Dual-SIM 128GB Smartphone (Unlocked

By Carlos
Rated 5 out of 5
Date: 2021-01-11

Excellent performance. I recommend it!

Nice phone

By Myron
Rated 4 out of 5
Date: 2021-01-10

Nice phone comes with clear cover. Box appears to have been opened. Hard to take Screenshots. Transferring photos from Gallery into individual folders very difficult; almost impossible. Samsung has no way to lock private photos into a special folder. Samsung service very poor as is the instruction manual. Phone came in Spanish settings & was not easy to switch to English. I prefer my similar LG phone; much simpler to use & lighter to carry. On the plus side, battery charges quicker & lasts longer.

Worst phone ever. Do not buy.

By Sosep
Rated 1 out of 5
Date: 2020-12-30

I bought this phone for my wife as a replacement to her old samsung Galaxy that she's had for 3 years. On paper, the A51 looks great. In the real world, it's a terrible phone. Alright. From the top. Out of the box the phone's software is in Spanish; that's expected since it's an international model phone. After setup you can change the language to whatever you need it to be. Right away, though, there are noticeable software issues after doing so. The screen doesn't always respond to touch input or wake up when you want it to. It can take a few tries to get the screen to come on. Restarts/crashes happen frequently and software update doesn't seem to address this issue. The phone itself is very light weight; not in a good way. It's build quality is quite fragile, especially compared to my Galaxy S9. It does have dual SIM cards plus MicroSD. We had installed a single SIM card and an SD card. The phone would never recognize that an SD card was installed. The phone would still say the MicroSD card tray was empty. Despite testing with a few cards it would never register an SD card had been inserted. After just 3 months, the phone up and died. Literally. Unexpectedly and without discernable cause. My wife woke up and the screen turned on, but wouldn't respond to touch input. After a force restart, we noticed a small purple spot on the screen. Over the next few hours the purple spot spread through to the entire screen. The phone was never dropped/submerged and was in a case since bought new. We're at a loss as to how or why this happened. It just unexpectedly and suddenly died. We've taken it to several repair centers. This phone can't be repaired as parts are not made available for repairers for this phone. And since it's an international model phone, there is no warranty coverage for us Canadians. It's a real disappointment for us; this experience has been a very expensive mistake.

See any errors on this page? Let us know


Will this work on Verizon

Will this work on Verizon
Asked by: Maria
No, This Smartphone will Not work with the Verizon Network.
Answered by: Dov
Date published: 2021-01-17


Asked by: Alejandro
Yes, this is brand new.
Answered by: Nilson D
Date published: 2021-01-19


Asked by: Alejandro
Yes, All the products on our website are new unless stated otherwise.
Answered by: Miguel
Date published: 2021-01-13

Is this phone all in english manual's?

Is this phone all in english manual's?
Asked by: David
No manual was included in box.
Answered by: Myron
Date published: 2021-01-11

Is this phone CDMA compatible?

Is this phone CDMA compatible?
Asked by: Donnie
This Model of the phone is Not Compatible with CDMA.
Answered by: Dov
Date published: 2020-12-06

Does this phone work with Cricket?

Does this phone work with Cricket?
Asked by: David
Yes, As they use the AT&T Network for 4G LTE.
Answered by: Dov
Date published: 2020-12-02

Does it have NFC?

Does it have NFC?
Asked by: Catalina
Per the SPECS tab, it mentioned NFC = NO. Pls make a correction.
Answered by: Gary
Date published: 2020-12-09

Does this work with Spectrum Mobile?

Does this work with Spectrum Mobile?
Asked by: Carole
This Smartphone will Not work with Spectrum mobile as they use Verizon as the Parent carrier.
Answered by: Dov
Date published: 2020-11-30
  • y_2021, m_1, d_21, h_2CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.13
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_56
  • loc_en_US, sid_1561967, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_bhphotovideo