Sell Your Samsung Galaxy S21 Ultra
Highest Payout
More than AT&T, Verizon, and T-Mobile
Fast Payments via Zelle, Venmo, Apple Pay & PayPal
30-Day Price Lock Double the Avg Buyback
SellmyCellphone clearly laid...
SellmyCellphone clearly laid out the process on their website, and that's exactly how it happened. Free shipping fast checking, and quick payment. Everything was explained in simple terms, which made the experience smooth and stress free..
Excellent spot to sell bulk…
Excellent spot to sell bulk phones! They offer customized trade-in options and provide personalized signatures for added assurance and insurance..
I needed a phone for my son..
I needed a phone for my son iPhone 15 pro max white titanium, 256 GB cause he broke his again ,nothing new and rite before new years but thanks to my guys @ Sellmycellphone...
These guys gave me way more..
These guys gave me way more than the other places I tried. Once I said yes it was almost instantly that I had my cash and was off to do some holiday shopping...
I got extra shopping money..
I got extra shopping money for this Christmas and it was easy and fast. They paid way more than the kiosk by far. Go see them first. Awesome!!
More Great Reasons To Sell To Us
How Much Is a Samsung Galaxy S21 Ultra Worth?
The value of your Samsung Galaxy S21 Ultra depends on several factors, including storage capacity, carrier, unlocked status, physical condition, and whether all functions work properly.
Whether you have the 128GB, 256GB, or 512GB model, SellMyCellPhone makes it easy to check your device's current value and get an offer online.
Select your device details above to get an instant offer. It's fast, free, and there's no obligation to sell.
Quick Take
Your Galaxy S21 Ultra can still be worth solid cash, even several generations removed from the newest Ultra releases. Storage capacity, carrier status, condition, and market demand all affect the final offer. The fastest way to find your exact value is to select your device details and request a quote.
What Affects Your Galaxy S21 Ultra Value?
Storage Capacity
The 128GB, 256GB, and 512GB versions can have different values. More storage can increase resale value.
Carrier and Unlock Status
Unlocked devices can be attractive to more buyers because they are not tied to a particular carrier.
Condition
A flawless phone generally receives more than one with scratches, dents, cracked glass, or functional problems.
Why the S21 Ultra Still Sells
Being a few generations old doesn't mean a phone stops moving. The S21 Ultra was the model that proved an Ultra-tier Galaxy could rival the Note experience, and that reputation still brings in a specific type of buyer today.
Sell Galaxy S21 Ultra by Storage
Galaxy S21 Ultra 128GB
A solid fit for everyday users with lighter storage needs.
Galaxy S21 Ultra 256GB
Great for everyday users who need plenty of space.
Galaxy S21 Ultra 512GB
More space for photos, videos, games, and apps.
Can You Sell Your Samsung Galaxy S21 Ultra for Cash Today?
Yes. Select your carrier, storage, and condition to get a quote in seconds. Ship it using the free prepaid label we send you, and once it arrives and passes inspection, payment typically goes out the same day. If you're searching for a way to sell your S21 Ultra for cash today and mean today, this beats waiting on a marketplace buyer or trying to track down a private sale.
Trade-In vs. Selling Your Galaxy S21 Ultra for Cash
Carrier Trade-In
Bill credits or device credit. Convenient when upgrading, but the value is often lower and tied to your carrier.
Samsung Trade-In
Credit toward a Samsung purchase. Easy during a new purchase, but you receive credit rather than cash.
Sell for Cash (Us)
Cash via your selected payment method, with more flexibility and no new purchase required.
Private Sale
Potentially higher private-sale price, but it takes more time and involves buyer risk.
Sell Your Galaxy S21 Ultra by Condition
Be honest about your device condition to receive the most accurate offer.
Flawless
Like new with no scratches or visible signs of use.
Excellent
Minimal signs of use with no deep scratches.
Good
Light scratches or minor signs of normal use.
Fair
Visible scratches, dents, or noticeable wear.
Faulty
Major damage or functional problems.
Important Things to Know Before Selling
Can I Sell a Damaged Galaxy S21 Ultra?
Yes. We buy Galaxy S21 Ultra phones even if they have damage or functional issues, including:
- Cracked or broken screens
- Back glass damage
- Camera issues
- Battery problems
- Charging port issues
As long as it powers on, we'll make an offer. The one thing we can't work with is water damage or a device that won't turn on at all.
Can I Sell a Financed, Locked, or Blacklisted Galaxy S21 Ultra?
We can only accept devices that are fully paid off and not reported lost, stolen, or blocked.
We do NOT accept:
- Lost or stolen devices
- Blocked or blacklisted devices
- Activation-locked devices
- Devices with outstanding balances
How to Find Your Device Information
- IMEI Number: Dial *#06# on your phone
- Storage: Settings > About phone > Storage
- Carrier: Settings > Connections > Network operators
How to Sell Your Samsung Galaxy S21 Ultra
Get Your Quote
Select your carrier, storage capacity, and condition to receive your offer.
Accept the Offer
Review your offer and accept it online if you're happy with the value.
Ship Your Device
Use the prepaid shipping label, package your phone, and ship it to us for free.
Get Paid Fast
Once we receive and inspect your device, we'll process your payment.
Why SellMyCellPhone Is the Best Place to Sell Your Galaxy S21 Ultra
Average payout compared with major buyback platforms.
Average payout compared with ecoATM specifically.
We don't just say we pay more, we've shown it. In a side-by-side comparison against major buyback platforms, SellMyCellPhone paid an average of 30% more overall, and about 128% more than ecoATM specifically. Older Ultra models like the S21 Ultra are exactly where some platforms cut their offers the most aggressively, betting sellers won't bother comparing an aging flagship across multiple sites. Before you accept the first quote you see, it's worth checking what SellMyCellPhone will offer.
Is Selling a Samsung Galaxy S21 Ultra for Cash Worth It?
For many owners, selling the Galaxy S21 Ultra for cash is a straightforward way to turn a phone that's aged out of daily use into money, rather than letting it sit as an unused backup. Instead of being limited to carrier credits or a new-device purchase, selling for cash gives you flexibility over how you use it. The amount you receive ultimately depends on your phone's storage, carrier status, condition, and current market demand. Check your device details above to find your current offer.
Frequently Asked Questions
The amount you can get for a Samsung Galaxy S21 Ultra depends on its storage capacity, carrier status, and condition. The 128GB, 256GB, and 512GB versions can have different values, while cosmetic and functional issues can reduce your offer. Select your device details above to see your current value.
The S21 Ultra has lost value since its launch as newer Galaxy Ultra models have entered the market. However, it still has resale value because it was a premium flagship with high-end cameras, a large display, and strong hardware. Your specific offer depends on its current condition, storage, and carrier.
Yes. If you're no longer using your S21 Ultra, selling it can be a better option than keeping an older phone that continues to depreciate. Even previous-generation flagship devices can retain value when they're in good working condition.
Not necessarily. A repair can improve the phone's condition, but the cost of the repair may be greater than the increase in resale value. Before spending money on repairs, compare the expected repair cost with the offer for the phone in its current condition.
Yes you can. Screen problems can affect the condition and resale value of your S21 Ultra but it doesn't make it worthless.
SellMyCellPhone is the best place to sell your Samsung S21 Ultra: get an instant quote based on your device's exact specs, ship it to us using a free prepaid label, and get paid once it's received and inspected.
If the actual condition of your Samsung Galaxy S21 Ultra is different from the condition selected during the quote, the device may receive a revised offer after inspection.
To avoid surprises, carefully inspect your phone before requesting a quote. Check the screen, body, cameras, battery, charging port, buttons, and other major functions, then select the condition that most accurately describes your device.
For more detailed preparation advice, read how to prepare your phone for trade-in.
Back up your photos and other important data, sign out of your Google and Samsung accounts, remove your SIM card, disable security locks, and perform a factory reset. This protects your personal information and helps prepare the phone for inspection
Once your S21 Ultra arrives and passes inspection, payment typically goes out the same day via Zelle, Venmo, Apple Pay, or PayPal.
If you complete the checkout process, your S21 Ultra's quote will last 30-days, giving you time to ship your device without immediately losing your quoted price.