- TrueGrade tested — passes our 25-point inspection
- Fast, tracked shipping
- 90-day returns
- Up to 70% cheaper than new
Samsung Galaxy S21 Ultra 5G – Phantom Black
Buy a certified refurbished Samsung Galaxy S21 Ultra 5G in Phantom Black from $49 at Device Giant — every Galaxy S21 Ultra 5G is fully tested under our 25-point TrueGrade inspection, ships unlocked-ready, and is backed by our 90-day warranty and free US shipping. The Samsung Galaxy S21 Ultra 5G, released in 2021, stands as a pinnacle of smartphone technology, offering an unparalleled premium experience. It boasts a stunning 6.8-inch Dynamic AMOLED 2X display with an adaptive 120Hz refresh rate, delivering incredibly smooth visuals and vibrant colors. Powering this device is the formidable Qualcomm Snapdragon 888 5G processor (for US models), ensuring top-tier performance for gaming, multitasking, and demanding applications. Compare grades, storage and carrier options below and save versus buying new.
Galaxy S21 Ultra 5G key features
- Stunning 6.8-inch Dynamic AMOLED 2X 120Hz display
- Advanced 108MP quad-camera system with 100x Space Zoom
- Qualcomm Snapdragon 888 5G processor for top performance
- S Pen support (first for Galaxy S series)
- Large 5000 mAh battery with fast wired and wireless charging
- Premium glass and aluminum build with IP68 water resistance
- 5G connectivity for ultra-fast speeds
- Stereo speakers for immersive audio
Galaxy S21 Ultra 5G full specifications
| Display | 6.8 in Dynamic AMOLED 2X, 1440 x 3200 pixels, 120Hz adaptive |
|---|---|
| Processor | Octa Core |
| RAM | 12 GB |
| Storage | 128GB, 256GB, 512GB, 1TB |
| Rear camera | 108 MP |
| Front camera | |
| Battery | 5000 mAh, 25W wired fast charging (PD3.0) |
| Build | Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame, IP68 dust/water resi |
| Operating system | Android |
| Network | GSM / CDMA / HSPA / EVDO / LTE / 5G (Sub-6 and mmWave) |
| Biometrics | Under-display fingerprint (ultrasonic), Face recognition |
| Dimensions | 165.1 x 75.6 x 8.9 mm |
| Weight | 227 g |
Why buy a refurbished Galaxy S21 Ultra 5G?
- Save big — a used Galaxy S21 Ultra 5G starts at just $49, well below retail.
- 25-point TrueGrade tested — battery, screen, cameras, buttons and network all verified.
- 90-day warranty & free shipping on every Galaxy S21 Ultra 5G.
- Better for the planet — buying refurbished keeps e-waste out of landfills.
- Upgrade to the latest flagship model
- High resale value due to premium features and brand reputation
- Excellent camera system for photography and videography
Galaxy S21 Ultra 5G pros and cons
Pros
- Exceptional Dynamic AMOLED 2X display with adaptive 120Hz
- Highly versatile and powerful camera system
- Robust performance from the Snapdragon 888 5G chipset
- Good battery life for a flagship device
- S Pen compatibility adds significant functionality
Things to know
- No expandable storage via microSD card
- No 3.5mm headphone jack
- Large and heavy form factor
- S Pen not included in the box
Carrier compatibility
This refurbished Galaxy S21 Ultra 5G is available unlocked and compatible with AT&T, AT&T/Unlocked, CDMA/GSM Unlocked, Factory CDMA/GSM Unlocked, GSM Unlocked, Spectrum, T-Mobile, T-Mobile/Unlocked, US Cellular/Unlocked, Verizon, Verizon/Unlocked, Xfinity. Check the carrier selector above — we only show options we have in stock so you can buy the exact Galaxy S21 Ultra 5G that works on your network.
Storage options
Choose the Galaxy S21 Ultra 5G in 128GB, 256GB, 512GB. Pick more storage for photos, apps and offline media.
TrueGrade condition guide
- Grade A — Excellent: like-new, minimal to no visible wear.
- Grade B — Great: light signs of use, fully functional.
- Grade C — Fair: visible wear at the best price.
- As-is / damaged: clearly described cosmetic or functional notes, priced accordingly.
Galaxy S21 Ultra 5G — frequently asked questions
Is the Samsung Galaxy S21 Ultra 5G still worth buying in 2026?
Yes — with Stunning 6.8-inch Dynamic AMOLED 2X 120Hz display and a proven design, the Galaxy S21 Ultra 5G remains a great-value refurbished phone, especially at $49 with a 90-day warranty.
Does the refurbished Galaxy S21 Ultra 5G come unlocked?
Most Galaxy S21 Ultra 5G units are sold unlocked and ready for AT&T, AT&T/Unlocked, CDMA/GSM Unlocked, Factory CDMA/GSM Unlocked, GSM Unlocked, Spectrum, T-Mobile, T-Mobile/Unlocked, US Cellular/Unlocked, Verizon, Verizon/Unlocked, Xfinity. Carrier-specific versions are clearly labeled in the carrier selector.
How much does a used Galaxy S21 Ultra 5G cost?
At Device Giant a refurbished Galaxy S21 Ultra 5G starts from $49, with the exact price depending on storage, carrier and TrueGrade condition.
What's included with a refurbished Galaxy S21 Ultra 5G?
Your Galaxy S21 Ultra 5G ships fully reset and tested with a compatible charging cable, a 90-day warranty and free shipping. Accessories vary by condition.
What do the condition grades mean?
See the TrueGrade guide above — A (excellent), B (great), C (fair) and clearly-described as-is options, so you can pick the right balance of price and cosmetics for your Galaxy S21 Ultra 5G.
Every device is graded for cosmetic condition and tested for full function against our TrueGrade 25-point inspection. Buying refurbished keeps a working phone out of landfill — better for your wallet and the planet.
Better for your wallet & the planet
Every refurbished phone is a win for the planet
Choosing refurbished over new keeps a working device out of landfill — and skips the carbon, water and raw materials it takes to build a brand-new one. A small choice with real impact.
Less carbon
Most of a phone's lifetime emissions come from manufacturing. Reuse skips nearly all of it.
Less e-waste
Millions of devices are trashed every year. Every reused phone is one less in a landfill.
Fewer raw materials
No new mining of rare metals, no manufacturing water use — the device already exists.
Circular by design
When a device truly can't be saved, we harvest its working parts and recycle the rest responsibly.
Refurbished is not a compromise. It is the smarter, greener way to buy tech, and every TrueGrade device ships tested, graded and ready for its second life. See how we do it →
