Galaxy A51 5G 128 GB - Black - Unlocked

  • Galaxy A51 5G
1 - 4
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Installment plans.


Storage (GB)


US Mobile - Prepaid SIM Kit

Comes with

Good Karma
Charging cable

For you? Only the best.

Refurbished and sold by COS Phones

Live on Back Market since 2019


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Galaxy A51 5G's customer reviews


17 verified reviews in the last 6 months.

  • J

    James B.


    Reviewed in the United States on December 23, 2022

    I've bought three phones from Back Market and I'm really happy with them except for one little problem. I bought a Galaxy A51 5G T-Mobile as directred by my carrier (not T-Mobile). Since I wasn't a T-Mobile customer directly, they would not unlock my phone. They insisted the place I bought it from (you) would unlock it. NOPE! So I had to buy ANOTHER A51 5G unlocked. I was unhappy that you only offered $14 trade in for the mint condition one I paid $240 for nine months earlier. -James B.
    Galaxy A51 5G 128GB - Black - Unlocked

    Purchased on December 12, 2022

  • E

    Emmett D.


    Reviewed in the United States on February 8, 2023

    Thank you. BM quality and service was great. Unfortunately, i did not have the IMEI number prior to ordering and when I attempted to register the phone with Spectrum Mobile, they informed me that the Samsung A51 models are no longer compatible with their system. Best Regards, EHD
    Galaxy A51 5G 128GB - Black - Unlocked

    Purchased on February 3, 2023

  • D

    Doug O.


    Reviewed in the United States on April 17, 2023

    The phone, just like the 2 previously purchased from back market are better than described / graded. The phone itself is a great value buy. Side buttons are opposite of the galaxy series, but its not a big deal to me. All good in the hood here.
    Galaxy A51 5G 128GB - Prism Cube Black - Locked AT&T

    Purchased on March 7, 2023

  • T

    Tracy M.


    Reviewed in the United States on March 12, 2023

    I bought one in fair condition which has a small amount of visible wear, but nothing major. Small marks from the case on the edges and a little bit of wear pattern on the screen, which disappears under a screen protector so might as well not exist to me. It was easy to set up and I've had 0 problems with it. Specs wise it's a nice upgrade from the Blu V91 I ended up buying when my previous phone died suddenly just out of warranty, so I'm really happy with the price, performance, and condition. It also arrived VERY quickly.
    Galaxy A51 5G 128GB - Prism Cube Black - Unlocked

    Purchased on February 25, 2023

  • B

    Brian D.


    Reviewed in the United States on May 4, 2023

    Recently I upgraded my service with AT&T. I was using a Samsung A51 5G on this network. The phone was not an AT&T purchase, but one off of EBay. It was Unlocked and was capable of being used internationally or on different service providers. When the upgrade of service was complete, everything on my phone worked perfectly... except I could not make or receive calls. It appears AT&T had blocked my IMEI because I did not buy my phone from them. I went to the AT&T store to inquire why, all they could do was tell me to buy a new AT&T phone. However, one of the clerks told me about Back Market. I went to the site and ordered a new-to-me Samsung A51 5G. I wanted the same phone because I have too much stuff on my old phone and it was to transfer everything over to the new one. The new phone was AT&T authorized and it worked right away when I inserted the SIM card. Back Market is one of those best kept secrets that needs to be unclassified and disseminated to everyone. The phone came quickly, well boxed, and with just the thins one needs like a charging cable. Nothing else. And like I said, worked perfectly the first time. In the military when something is done right and done well, we gi ...
    Galaxy A51 5G 128GB - Prism Cube Black - Locked AT&T

    Purchased on April 4, 2023

  • M

    Michael K.


    Reviewed in the United States on January 23, 2023

    As usual I am extremely pleased with the quality of the products purchased from Blackmarket. I have purchased laptops, cell phones and each and everyone of the products have been of excellent quality...I'm always notified as to the shipping and estimated delivery date... That is why I am a repeat customer...Keep up the great work Blackmarket
    Galaxy A51 5G 128GB - Prism Cube Black - Locked T-Mobile

    Purchased on January 11, 2023

  • R

    Reggie C.


    Reviewed in the United States on December 15, 2022

    Great phone for the money. Not a big Samsung fan. But this phone is impressive. Thanks for doing a great job.
    Galaxy A51 5G 128GB - Prism Cube Black - Locked T-Mobile

    Purchased on October 3, 2022

See all 17 reviews

Reborn vs. brand new
Here’s what you help prevent on average by choosing a reborn smartphone over a brand new one.

171.1 lbs of CO2e

That's like driving an SUV from NYC to Chicago.

6.3 oz of e-waste

That’s around the weight of a baseball.

537.1 lbs of raw materials

That's like 20 dogs digging in your yard for a week.

20,341.2 gallons of water

That's like running a faucet for 3 days

Everything you ever wanted to know about the Galaxy A51 5G

Samsung Galaxy A51 5G 128GB Black - Unlocked

Our partners are electronics experts who test and verify that each item is 100% functional before it leaves the workshop. This is the reason you benefit from a minimum 1-year warranty with the purchase of a refurbished device at Back Market.

Galaxy A51 5G - 128 GB - Black - Unlocked

  • Screen size (inches) : 6.5
  • Color : Black
  • Carrier compatibility : Unlocked
  • Storage : 128 GB
  • Model : Galaxy A51 5G
  • Network : GSM/CDMA + 5G
  • Double SIM : No
  • Manufacturer Ref. : SM-A516F
  • 5G : Yes
  • Verizon compatible : No
  • AT&T compatible : No
  • T-Mobile compatible : No
  • Memory Card Slot : Yes
  • Memory : 8 GB
  • eSIM : No
  • Megapixels : 48
  • OS : Android
  • Foldable : No
  • Connector : USB-C + Jack 3.5mm
  • Release Date : April 2020
  • Release Year : 2020
  • Dual SIM : Single-SIM
  • SIM format : Nano
  • Brand : Samsung
  • Weight : 6 oz

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