Galaxy S21 5GGrey • 256 GB • Dual Physical SIM + eSIM

Name: Galaxy S21 5G 256GB - Grey - Unlocked
Brand: Samsung
Price: 250.00 EUR
Availability: InStock
Rating: 4.3 (19046 reviews)

(19,046 reviews)

€250.00

Save €1,009.00

Free delivery by 6 - 7 Jul

Restored professionally

Based on up to 100 points of inspection

Customer reviews for Galaxy S21 5G

Overall rating

19,046 verified reviews

Rating details

Accessories
4.1/5
Appearance
4.5/5
Battery
4/5
Lens & Camera
4.5/5
Overall performance
4.2/5
Packaging
4.5/5
Shipping
4.6/5

Reviews

Fiona M.
Verified purchase
Reviewed 10/02/2025, Ireland.
I can noy fault my experience with Back Market. I ordered the phone at 8.30 am on thursday and it was delivered to Ireland by 12pm on the Friday, the next day. The phone is perfect. Amazing quality. I will definitely buy more.
Galaxy S21 5G 256GB - Purple - Unlocked
Galaxy S21 5G 256GB - Purple - Unlocked
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
30/01/2025
Liam D.
Verified purchase
Reviewed 12/08/2024, Ireland.
Excellent all around. Site was easy to use and kept me informed of postal delivery etc. I got two o hones and they are both excellent. The description was right on the mark and I will be definitely using thus site again.
Galaxy S21 5G 128GB - Grey - Unlocked
Galaxy S21 5G 128GB - Grey - Unlocked
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
29/07/2024
Anne H.
Verified purchase
Reviewed 10/09/2023, Ireland.
I love my new phone, it really does feel brand new. Being able to go sim only will halve my phone bill. The whole process was very easy, have recommended Back Market to several people already. No more massive bills, delighted
Galaxy S21 5G 128GB - Purple - Unlocked
Galaxy S21 5G 128GB - Purple - Unlocked
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
26/08/2023
John M.
Verified purchase
Reviewed 01/10/2025, Ireland.
Great, it arrived on time and was simple to transfer all the data across ftom my old mobile to my new one.
Galaxy S21 5G 128GB - Grey - Unlocked
Galaxy S21 5G 128GB - Grey - Unlocked
Condition
Fair
Signs of wear. The body may have a few visible scratches and dents. Items with screens may have light scratches.
Purchased
10/09/2025
James F.
Verified purchase
Reviewed 15/12/2024, Ireland.
I'm very happy with my purchase it's in mint condition and working perfectly. I would recommend Back Market to anyone
Galaxy S21 5G 128GB - Purple - Unlocked
Galaxy S21 5G 128GB - Purple - Unlocked
Condition
Premium
Close to perfection. The body may have tiny micro-scratches. For items with screens, the screen will be flawless.
Purchased
25/11/2024
Conor F.
Verified purchase
Reviewed 09/08/2023, Ireland.
First time buying a refurbished phone and will continue to by refurbished. . . . . . I have been using the phone for a while now and it is next to new, I am very happy with it and I will be consulting Back Market should I need any other devices. I would highly recommend!
Galaxy S21 5G 128GB - Grey - Unlocked
Galaxy S21 5G 128GB - Grey - Unlocked
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
26/07/2023
Ciara C.
Verified purchase
Reviewed 08/09/2025, Ireland.
Paid for a premium refurbished unlocked phone. When the phone came it was locked to another network. I had to return the phone leaving me with no phone for some days. I was not impressed. Will not use this site again.
Galaxy S21 5G 128GB - Grey - Unlocked
Galaxy S21 5G 128GB - Grey - Unlocked
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
27/08/2025

Everything you ever wanted to know about the Galaxy S21 5G

Durability
Overall performance
Camera
Screen quality

8 GBMemory (GB)
1080 x 2400Resolution
0,456SAR head
GreyColour
AndroidOS
Galaxy S21 5GModel
15,17 cmHeight
SM-G991B/DSManufacturer Ref
Dynamic AMOLED 2XScreen type

The Galaxy S21 5G is a flagship smartphone from Samsung, launched in January 2021. With its sleek design and powerful features, it remains a popular choice for users seeking a reliable device for both work and play.

Key features:

Release Date: January 2021
Display: 6,2-inch Dynamic AMOLED 2X, FHD+ resolution
Processor: Exynos 2100 (International) / Snapdragon 888 (USA)
Camera: Triple rear cameras with 12MP ultra-wide, 12MP wide, and 64MP telephoto lenses
Connectivity: 5G compatible for high-speed internet access.

Who is this for?

The Galaxy S21 5G is ideal for professionals and casual users alike who require a high-performance smartphone for multitasking, photography, and streaming. Its compact size makes it suitable for users who prefer a device that fits comfortably in hand or pocket.

Pros & Cons:

Pros	Cons
Stunning display with vibrant colours and deep contrasts.	No expandable storage option available.
Versatile camera system for various photography needs.	Plastic back may feel less premium compared to glass models.

Why refurbished?

Choosing a refurbished Galaxy S21 5G allows you to enjoy a top-tier smartphone while being environmentally conscious. Each device undergoes rigorous testing to ensure it meets high standards of quality and performance. Scopri di più sui nostri standard di qualità.

Memory (GB): 8 GB
Resolution: 1080 x 2400
SAR head: 0,456
Colour: Grey
OS: Android
Model: Galaxy S21 5G
Height: 15,17 cm
Manufacturer Ref: SM-G991B/DS
Screen type: Dynamic AMOLED 2X
SAR body: 1,509
Weight: 169 g
Year of Release: 2021
Foldable: No
Depth: 0,79 cm
Network: 5G
Screen size (in): 6.2
Color (official name): Phantom gray
Width: 7,12 cm
SD Card Slot: No
Carrier compatibility: Unlocked
Main camera: 12 megapixels
Brand: Samsung
Compatible with latest Update: Yes
Front camera: 10 megapixels
SIM card: Dual Physical SIM + eSIM
Storage: 256 GB
Serie: Samsung Galaxy S

Choose location

Suggested searches

Popular searches

Galaxy S21 5GGrey • 256 GB • Dual Physical SIM + eSIM

Galaxy S21 5GGrey • 256 GB • Dual Physical SIM + eSIM

Restored professionally

Comes with

Often bought together

Customer reviews for Galaxy S21 5G

Overall rating

Rating details

Reviews

Reviews

Fiona M.

Liam D.

Anne H.

John M.

James F.

Conor F.

Ciara C.

Popular searches

Everything you ever wanted to know about the Galaxy S21 5G

Durability

Overall performance

Camera

Screen quality

Related articles

Is the Samsung S9 still a good phone to buy? | Back Market

Samsung Galaxy S23 review: display, design, performance and camera specs | Back Market

Samsung Galaxy S22: Price, Release Date and Technical Specifications | Back Market

The best Samsung phone in 2025 | Back Market

Samsung S10e review – Retro Cool or Just Old? | Back Market

Our review of the Samsung Galaxy A71 | Back Market

Samsung Galaxy Tab S9 series first look review: which one should you get? | Back Market

Welcome to Back Market