1 / 3.

Galaxy S21 5G 128GB - Gray - Locked T-Mobile

$141.00
before trade-in
Save $658.00

Affirm
Buy now, pay later.

Free delivery by Apr 29 - Apr 30
Express delivery by Apr 28 - Apr 29 from $15.00

All devices are restored professionally based on a 25-point inspection

  • Buttons
  • SIM and/or memory card reader
  • Data deletion
  • Chargers and/or cables
  • Unlocking
  • GPS and/or positioning system
  • Cameras
  • External sensors
  • Biometric sensors
  • WiFi and Bluetooth
  • IMEI serial number
  • Oxidation
  • Flash and indicator lights
  • Mics and speakers
  • Input and output ports
  • Phone carrier
  • Battery health
  • Mechanical parts
  • Parts compatibility
  • Screen
  • Other features specific to this device

Tadaaa

Galaxy S21 5G 128GB - Gray - Locked T-Mobile
Galaxy S21 5G • Locked T-Mobile
Good128 GBGray
$141.00
before trade-in
Save $658.00

Proudly refurbished by Phone Depot

Free delivery by Apr 29 - Apr 30
Express delivery by Apr 28 - Apr 29 from $15.00

Comes with

Compatible charging cable

Galaxy S21 5G 128GB - Gray - Locked T-Mobile's customer reviews

4.3/5

50 verified reviews in the last 24 months.

  • P

    Patricia P.

    Purchased on March 6, 2025

    Verified purchase
    4.5/5

    Always feels good to buy a refurbished product that's been given new life vs a new one. The phone itself is great, but the battery life is less than average. Otherwise no complaints.

    Reviewed in the United States on April 5, 2025

  • A

    Andre P.

    Purchased on November 27, 2023

    Verified purchase
    4.6/5

    I recently snagged the Samsung Galaxy S21 5G from Back Market, and it's been a game-changer. This refurbished gem looks and feels brand new, and I couldn't be happier with the experience.

    Reviewed in the United States on March 26, 2025

  • G

    Gale K.

    Purchased on June 22, 2023

    Verified purchase
    4.9/5

    Phone is a described which is excellent condition. I have switched everything over from my S8 and all is working perfectly. I was very skeptical about refurbished but after doing some research I decided to order. I am very happy with my phone and will look for other refurbed items.

    Reviewed in the United States on March 26, 2025

  • T

    Tina F.

    Purchased on June 15, 2023

    Verified purchase
    4.7/5

    Being my first time buying from Back Market, I must say so far I'm impressed. I've just received my phone, s21 5G phantom violet, and it is only fair condition or so it says I can't not see any marks whatsoever. I will not get to connect it until I get to T-Mobile tomorrow so I will fill you in on the rest after I get hooked up to service but so far so great and if all goes well after activation, I will never buy a used phone ever again 😁 Only refurbished from Back Market 😀

    Reviewed in the United States on March 26, 2025

  • L

    Lori F.

    Purchased on February 17, 2024

    Verified purchase
    5/5

    Great device. Better condition than expected. Was able to get desired color and price was a wonderful. It also arrived three days earlier than expected. Great variety of choices and prices for all budgets. Highly recommend!!!! Thanks so much... this girl it very happy with her device and

    Reviewed in the United States on March 26, 2025

  • R

    Rafael V.

    Purchased on August 29, 2023

    Verified purchase
    4/5

    The truth is true. I don't know. This was a gift for a friend so I would like to guess no as soon as I get. Whenever she let me know how it worked. Okay, thank you, and I'll be buying more stuff from you guys. I enjoyed the other phone, though. A little

    Reviewed in the United States on March 26, 2025

  • J

    Johnny T.

    Purchased on May 23, 2023

    Verified purchase
    4.6/5

    Item was in great condition! No issues with putting in sim card to start using it right away. Battery life a little dissappointing but still lasts lot longer than my crappy iPhone. I did see this phone on amazon for a little more but i dont trust them checking the phones to confirm they have no issues like you guys do on this site. Extremely satisfied and excited to use this site for another purchase soon!

    Reviewed in the United States on March 26, 2025

See all 50 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 S21 5G 128GB - Gray - Locked T-Mobile

  • SM-G991UZAVManufacturing part numbers (MPN)

  • GrayColor

  • 6.2Screen size (inches)

  • Galaxy S21 5GModel

  • AndroidOS

  • 1080 x 2400Resolution

  • T-MobileCarrier compatibility

  • 128 GBStorage

  • 8 GBMemory

Galaxy S21 5G 128GB - Phantom Gray - Locked Sprint

Galaxy S21 5G 128GB - Gray - Locked T-Mobile
Manufacturing part numbers (MPN)SM-G991UZAV
ColorGray
Screen size (inches)6.2
ModelGalaxy S21 5G
OSAndroid
Resolution1080 x 2400
Carrier compatibilityT-Mobile
Storage128 GB
Memory8 GB
Screen typeDynamic AMOLED 2X
Network5G
Manufacturer Ref.SM-G991U
Memory Card SlotNo
Verizon compatibleNo
AT&T compatibleNo
T-Mobile compatibleNo
Release Year2021
Last OS CompatibilityYes
FoldableNo
Front camera10 megapixels
SAR head0.74
SAR body1.08
SeriesSamsung Galaxy S
SIM cardPhysical SIM + eSIM
Retro techNo
Main camera12 megapixels
Color (official name)Phantom Gray
Company nameSamsung Electronics
Company email addresssupport@samsung.com
Company postal addressSamsung House, 1000 Hillswood Drive, Chertsey, Surrey, KT16 0PS, UK
BrandSamsung
Weight6 oz

Welcome to Back Market

The best prices for high-quality reborn tech by sellers we’ve checked and vetted. We don’t mind if you Google us.

Get to know us
  • 1-year warranty
  • Free standard shipping
  • Free 30-day returns
  • Friendly customer service