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Deal.ai › Samsung
Samsung
Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black

Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black

Best price now

$52.82at MetroMotiveChecked 10 h ago

89% under what the other stores charge

Compared across 11 stores. Prices are checked against each store and labelled with when.

Visit MetroMotive
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Price facts

  • Lowest price today: $52.82 at MetroMotive (checked Nov 10, 2026).
  • Checked at 11 stores.

Our take on the Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black

The Samsung Galaxy S24 is a compact flagship phone with a 6.2-inch Dynamic AMOLED 2X display, Snapdragon 8 Gen 3 processor, and a versatile triple-camera system. It stands out for its Galaxy AI features, seven years of software updates, and strong performance in a small body. Reviewers praise its bright screen, long battery life, and reliable cameras, though some note the 128GB base storage and AT&T lock limit flexibility. It suits Android users who want a premium, pocketable phone on AT&T.

Best forAndroid users on AT&TFans of compact flagship phonesPhotographers who want versatile camerasBuyers who keep phones for years
Pros
  • Bright, smooth 6.2-inch AMOLED display
  • Fast Snapdragon 8 Gen 3 performance
  • Seven years of OS and security updates
  • Versatile triple camera with 3x optical zoom
  • Galaxy AI tools like Circle to Search and live translation
Cons
  • Locked to AT&T, cannot use other carriers
  • 128GB storage may fill up quickly
  • Good condition means visible scratches and possible dents
  • No charger or headphones in the box, only generic accessories

Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black prices at every store

  • SparkSatchelPre-owned

    In stockReturn policy

    $52.82Checked 10 h ago
    Visit SparkSatchel
  • MirMadinaPre-owned

    In stockReturn policy

    $52.82Checked 10 h ago
    Visit MirMadina
  • Corporate BuybacksPre-owned

    In stock

    $229.99Checked 10 h ago
    Visit Corporate Buybacks
  • Wisetek MarketPre-owned

    In stockReturn policy

    $259.99Checked 10 h ago
    Visit Wisetek Market
  • PayMore WexfordPre-owned

    In stockReturn policy

    $269.99Checked 10 h ago
    Visit PayMore Wexford
  • eBayNew

    In stockSold by qualitybuy2017

    $489.00+ $16.00 shippingChecked Nov 9
    Visit eBay
  • Best BuyNew

    In stock

    $649.97Free shippingChecked 10 h ago
    Visit Best Buy
  • WalmartRefurbished

    In stockSold by Cell Traders

    $649.99+ $45.00 shippingChecked 10 h ago
    Visit Walmart
  • MetroMotiveNew

    Availability unknownReturn policy

    $52.82Checked 10 h ago
    Visit MetroMotive
  • AmazonRefurbished

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $314.95Free shippingChecked Nov 9
    Visit Amazon
  • WalmartPre-owned

    Out of stockSold by Cell TradersReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $399.99Checked 10 h ago
    Visit Walmart

Store links may earn us a commission. Some prices via Klarna.

Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black price history

Lowest price we've seen: $489.00 on Nov 10 at eBay. Tracked across 2 stores since Nov 10.

What reviewers say

Reviewers and owners generally praise the Galaxy S24 for its compact size, bright display, and reliable performance. Battery life and camera quality are often highlighted as strengths, though some criticize the limited base storage and the AT&T lock.

What people mention
  • DisplayPraisedReviewers love the bright, vibrant AMOLED screen with smooth 120Hz scrolling.
  • BatteryPraisedOwners report all-day battery life with moderate use.
  • PerformancePraisedThe Snapdragon 8 Gen 3 handles games and multitasking without slowdown.
  • StorageCriticisedSome users find 128GB insufficient for photos, apps, and games.
  • Carrier lockCriticisedBuyers dislike that the phone only works on AT&T.
  • ConditionMixedUsed units may show scratches and dents, but remain fully functional.

About the Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black

Activation Status: 🔒

This Samsung Galaxy S24 is AT&T Locked . It is AT&T compatible and locked to their network. It cannot be used with other carriers or MVNOs. Please contact us with any questions about compatibility before purchasing.

Device Condition: ✅

This phone is in Good condition and has been fully tested to ensure optimal performance. The device has passed comprehensive functionality tests, including connectivity, touchscreen responsiveness, and hardware diagnostics. It shows noticeable signs of wear including heavier scratches that may be visible during use. Small dents may be present. Engraving may be visible on the back of the device. The screen has no cracks and the device is fully functional. It comes with a generic charger and generic packaging.

Model Information: ℹ️

The Samsung Galaxy S24 features Galaxy AI capabilities, a versatile triple-camera system, and a bright Dynamic AMOLED 2X display.

Device Specifications:

Model: Samsung Galaxy S24 (SM-S921U)

Color: Onyx Black

Storage Capacity: 128GB

Display Size: 6.2-inch

Connectivity: Wi-Fi, Bluetooth, GPS, AT&T Cellular

Operating System: Android

Package Contents: 📦

• Samsung Galaxy S24 (128GB, Onyx Black)

• Generic USB-C Charging Cable

• Generic Packaging

Notice:

This listing does not include the original box, SIM card, or additional accessories.

Questions and answers

Is the Galaxy S24 worth it compared to the S23?
Yes, the S24 brings a brighter display, longer software support (seven years), and Galaxy AI features. The S23 is still capable, but the S24 offers better longevity.
Can I use this phone with another carrier?
No, this unit is locked to AT&T and will not work with other carriers or MVNOs. You must use an AT&T SIM card.
How is the battery life on the Galaxy S24?
Most reviewers report all-day battery life with moderate use. Heavy users may need a top-up, but the 4,000mAh battery and efficient chip generally last a full day.
Does the Galaxy S24 support expandable storage?
No, the Galaxy S24 does not have a microSD card slot. You must choose the storage capacity at purchase; this model has 128GB.
What comes in the box with this phone?
It includes the phone, a generic charger, and generic packaging. Samsung no longer includes a charger or headphones in new retail boxes, so this matches the typical contents.
Is the Galaxy S24 good for photography?
Yes, the triple camera system (50MP main, 12MP ultrawide, 10MP 3x telephoto) delivers sharp photos and good low-light performance. Reviewers praise its versatility and color accuracy.
Where is the Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black cheapest?
At MetroMotive, for $52.82, 89% under what the other stores charge, as of our latest check.
Where can I buy the Samsung Galaxy S24 (SM-S921U) AT&T 128GB Onyx Black?
10 stores we checked sell it, including MetroMotive, SparkSatchel, PayMore Wexford, Corporate Buybacks, Wisetek Market.

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