Galaxy S21 5G • Locked AT&TBlack • 128 GB • Physical SIM + eSIM

(26 reviews)

$206.45

Save $201.84

Free delivery by Jun 12 - 15

Express delivery by Jun 11 - 12 from $15.00

Restored professionally

Based on up to 100 points of inspection

Customer reviews for Galaxy S21 5G • Locked AT&T

Overall rating

26 verified reviews

Rating details

Battery
3.7/5
Shipping
4.1/5
Lens & Camera
4.2/5
Accessories
3.6/5
Packaging
4.2/5
Overall performance
3.8/5
Appearance
4/5

Reviews

Wynne C.
Verified purchase
Reviewed 3/18/26, United States.
Excellent work from the seller "Dynamic IT Hardware". I received my phone in great condition. You could easily convince someone it was brand new just but looking at the hardware. The phone was also very safely and securely packaged which is a great sign. The only negative things I have to say is about the Back Market site. This was my first experience here and it was honestly horrible. The only good thing I have to say about this site is that the user interface is really good and easy to navigate. From the moment I started my checkout the problems began and I wont waste your time with all the details. But it is also worth it to mention that their customer service team does reply and try to help you thru your issue. And they were respectful to me even when I was getting upset and frustrated. So Back Market was professional on that front So overall the seller "Dynamic IT Hardware" gets a 5/5 score, but Back Market as a website would honestly get a 2/5.
Galaxy S21 5G 128GB - Gray - Locked AT&T
Galaxy S21 5G 128GB - Gray - Locked AT&T
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
3/13/26
Morgan S.
Verified purchase
Reviewed 1/27/24, United States.
I am totally in love with my new phone! I have gotten 3 phones now from back market and I love them so much! I always recommend back market to everyone!!!
Galaxy S21 5G 128GB - Purple - Locked AT&T
Galaxy S21 5G 128GB - Purple - Locked AT&T
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
1/25/24
Oksana K.
Verified purchase
Reviewed 12/27/24, United States.
really good, but I picked the excellent condition for it and had hit marks as if it was dropped and not repaired very good but if you want a 100% geranty that it's gonna be good get premium condition 👍👍👍👍👍👍👍
Galaxy S21 5G 128GB - Gray - Locked AT&T
Galaxy S21 5G 128GB - Gray - Locked AT&T
Condition
Excellent
Almost no signs of wear. The body may have very light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
12/23/24
Molly P.
Verified purchase
Reviewed 8/20/23, United States.
Phone is perfect, the only issued I had was that it was shipped with an aftermarket charger that didn't work with the device. Any easy fix and was still cheaper than new.
Galaxy S21 5G 128GB - Purple - Locked AT&T
Galaxy S21 5G 128GB - Purple - Locked AT&T
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
7/31/23
Moises V.
Verified purchase
Reviewed 1/16/25, United States.
I would start with check your information of your phone I was sent the s21 FE witch is not at all the s21 and the quality is really far from s21 I wouldn't have bought the FE version and what crazy is doesn't at all display any information of it being a FE literally says s21 5g locked AT&T I really was let down and gonna make a complaint I wait whole week to just get played I don't see how they thought they can get threw selling me The FE .
Galaxy S21 5G 128GB - Gray - Locked AT&T
Galaxy S21 5G 128GB - Gray - Locked AT&T
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
1/14/25
Kenesha L.
Verified purchase
Reviewed 1/12/25, United States.
Works like a charm. My 5th time buying a phone from here. Always a positive experience.
Galaxy S21 5G 128GB - Gray - Locked AT&T
Galaxy S21 5G 128GB - Gray - Locked AT&T
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
12/30/24
Adriana M.
Verified purchase
Reviewed 7/11/23, United States.
I love my phone now. The only thing I wish the website would show is why they rate the phone "fair, good, ans excellent" quality. I wasn't really sure how to expect the phone. I got good condition and it has scratches but I still love it.
Galaxy S21 5G 128GB - Purple - Locked AT&T
Galaxy S21 5G 128GB - Purple - Locked AT&T
Condition
Good
Light signs of wear. The body may have light micro-scratches. For items with screens, the screen will have no scratches.
Purchased
7/4/23

Everything you ever wanted to know about the Galaxy S21 5G • Locked AT&T

Durability
Overall performance
Camera
Screen quality

Physical SIM + eSIMSIM card
0.74SAR head
12 megapixelsMain camera
BlackColor (official name)
8 GBMemory (GB)
6 ozWeight
SamsungBrand
NoFoldable
SM-G991UManufacturer Ref.

The Galaxy S21 5G is a flagship-level smartphone that was released in early 2021. It offers a balance of performance, 5G connectivity, and a versatile camera system. This model is locked to AT&T and comes with 128GB of storage, making it suitable for everyday use, multimedia consumption, and light gaming.

Key features:

Display: 6.2-inch Dynamic AMOLED 2X with FHD+ resolution
Processor: Exynos 2100 (Global) or Snapdragon 888 (USA)
Camera: Triple rear cameras with 12MP wide, 12MP ultra-wide, and 64MP telephoto lenses
Connectivity: 5G capable for faster data speeds
Operating System: Ships with Android 11, upgradable to newer versions

Who is this for?

The Galaxy S21 5G is ideal for users seeking a premium Android device with 5G connectivity, good camera versatility, and a compact design. It’s suited for those who prefer a locked device for use on AT&T’s network or want a reliable pre-owned device for everyday tasks.

Pros & Cons: Pros Cons High-quality display with vibrant colors and smooth refresh rate. Locked to AT&T, limiting carrier flexibility. Powerful Snapdragon 888 processor for daily multitasking. No expandable storage option. Excellent camera system for versatile photography. Battery life may vary depending on usage.
Why refurbished?

Opting for a refurbished Galaxy S21 5G allows you to enjoy a high-end device at a more accessible price point. Each device from Back Market undergoes rigorous testing and quality checks to ensure reliable performance. Learn more about our quality standards.

SIM card: Physical SIM + eSIM
SAR head: 0.74
Main camera: 12 megapixels
Color (official name): Black
Memory (GB): 8 GB
Weight: 6 oz
Brand: Samsung
Foldable: No
Manufacturer Ref.: SM-G991U
Screen size (inches): 6.2
Network: 5G
Storage: 128 GB
Release Year: 2021
Carrier compatibility: AT&T
Color: Black
Resolution: 1080 x 2400
Front camera: 10 megapixels
Memory Card Slot: No
Screen type: Dynamic AMOLED 2X
OS: Android
Model: Galaxy S21 5G
Serie: Samsung Galaxy S
Last OS Compatibility: Yes

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Customer reviews for Galaxy S21 5G • Locked AT&T

Overall rating

Rating details

Reviews

Reviews

Wynne C.

Morgan S.

Oksana K.

Molly P.

Moises V.

Kenesha L.

Adriana M.

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Everything you ever wanted to know about the Galaxy S21 5G • Locked AT&T

Durability

Overall performance

Camera

Screen quality

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