Samsung Galaxy S21 Ultra 5G 128GB Phantom Black Unlocked Renewed SM-G998UZKAXAA

Product Overview

The Samsung Galaxy S21 Ultra 5G identified by ASIN B096T6Y623 is a renewed U.S.-version smartphone with 128GB of internal storage, a Phantom Black finish, and unlocked cellular operation. The underlying U.S. Galaxy S21 Ultra hardware belongs to Samsung’s SM-G998U family, while Samsung identifies the factory-unlocked 128GB Phantom Black configuration as MPN SM-G998UZKAXAA.

The device uses a 6.8-inch Dynamic AMOLED 2X display with a 3200 × 1440 resolution and an adaptive refresh rate reaching 120Hz. The 128GB configuration is paired with 12GB of RAM. Samsung designed the S21 Ultra as the highest-specification member of the Galaxy S21 generation, with support for S Pen input, 5G connectivity, Wi-Fi 6E, wireless charging, and Samsung DeX.

Photography hardware includes a 108MP wide camera, 12MP ultra-wide camera, two 10MP telephoto cameras, and a 40MP front camera. The two telephoto cameras provide native 3x and 10x optical zoom positions, while Samsung’s digital zoom system extends farther electronically. Video recording includes 8K capture at 24 frames per second.

A 5,000mAh typical battery powers the device. The phone also includes USB Type-C connectivity, Bluetooth 5.2, NFC, satellite positioning, an ultrasonic fingerprint sensor, stereo audio, and IP68-rated water and dust resistance.

Product Information

Identification

Samsung’s U.S. product records associate SM-G998UZKAXAA and UPC 887276473345 with the unlocked 128GB Phantom Black Galaxy S21 Ultra 5G. The referenced ASIN identifies a renewed version of that general U.S. configuration.

Physical

Samsung documents the U.S. Galaxy S21 Ultra at 165.1 mm tall, 75.6 mm wide, and 8.9 mm thick. The U.S. mmWave configuration weighs approximately 229 grams.

Product Identifier Summary

• Model Number: Identifies the hardware family or regional device variant and is commonly used for firmware, repairs, accessories, and network compatibility research.
• MPN: The manufacturer part number identifies a specific commercial configuration, including factors such as storage, color, and regional sales version.
• UPC: A 12-digit retail barcode identifier used for inventory management, catalog matching, and product identification.
• EAN: An international retail barcode format within the GTIN system. A separate verified EAN for this exact renewed listing is omitted.
• GTIN: The Global Trade Item Number system encompasses standardized identifiers including UPC and EAN. A UPC can function as a GTIN-12.
• ASIN: Identifies the referenced online catalog record and distinguishes it from other capacities, colors, carrier configurations, and product conditions.
• ISBN: Applies to books and qualifying publications and is not applicable to smartphones.

Common Uses

• Voice calls and text messaging.
• 5G and LTE mobile internet access.
• Web browsing and email.
• Photography and video recording.
• High-resolution and telephoto photography.
• Video conferencing.
• Navigation using satellite positioning services.
• Streaming video and music.
• Mobile gaming.
• Document viewing and editing.
• Note taking and drawing with compatible S Pen accessories.
• Wireless payments through supported NFC applications.
• Connecting to external displays through Samsung DeX.
• Wireless charging of the phone.
• Wireless PowerShare with compatible accessories and devices.

Maintenance and Care

Clean the display, camera lenses, and exterior using a soft, lint-free cloth. Abrasive cleaners, rough materials, and excessive pressure can damage surface coatings.

Keep the USB Type-C port free of moisture, dust, and foreign material. Allow the connector to dry completely before attaching charging or data equipment if it becomes wet.

Protect the camera lenses and display from impacts and abrasive particles. A properly fitted case can reduce direct contact with hard surfaces, although it does not eliminate the risk of damage.

Rechargeable lithium-ion batteries naturally lose capacity as they age. Excessive heat can accelerate battery degradation, so prolonged exposure to high temperatures should be avoided.

Software updates should be installed through the device’s supported update system when available. Resetting or transferring ownership of a renewed device should include removal of previous accounts and personal data.

Safety Information

• The device contains a rechargeable lithium-ion battery and should not be punctured, crushed, burned, or intentionally dismantled.
• Stop using the device if the battery becomes swollen, physically damaged, or abnormally hot.
• Use compatible charging cables, adapters, and wireless charging equipment.
• Do not charge the phone through the USB connector while moisture is present.
• Samsung specifies IP68 resistance for the Galaxy S21 Ultra under defined laboratory conditions. Water resistance can decrease after physical damage or repair and should not be treated as permanent protection.
• Keep the device away from extreme heat and open flames.
• Damaged glass can create sharp edges and should be handled carefully until repaired.

Samsung specifies IP68 protection for the Galaxy S21 Ultra family, while normal wear, impact damage, and service work can affect sealing over time.

Technical Specifications

Samsung’s technical documentation verifies the primary display, memory, camera, connectivity, battery, physical, S Pen, and charging characteristics listed above.

Product History

Samsung announced the Galaxy S21 Ultra 5G in January 2021 as the largest and most extensively equipped member of the Galaxy S21 family. It launched alongside the Galaxy S21 5G and Galaxy S21+ 5G.

The S21 Ultra introduced several distinctions within that generation, including a 6.8-inch QHD+ adaptive 120Hz display, dual telephoto cameras, 100x digital zoom capability, and the first S-series implementation of S Pen input support. It was offered with 128GB, 256GB, and 512GB storage configurations, with RAM capacity depending on storage level.

The Galaxy S21 Ultra followed the Galaxy S20 Ultra and was later succeeded by the Galaxy S22 Ultra. Samsung’s March 2022 business price records listed the unlocked 128GB Phantom Black S21 Ultra configuration as end-of-life, reflecting its replacement by the following generation.

Key Features

• 6.8-inch Dynamic AMOLED 2X display.
• Quad HD+ resolution.
• Adaptive refresh rate up to 120Hz.
• HDR10+ display support.
• 12GB of RAM in the 128GB configuration.
• 128GB of internal storage.
• 108MP primary rear camera.
• 12MP ultra-wide rear camera.
• Two separate 10MP telephoto cameras.
• 3x optical telephoto position.
• 10x optical telephoto position.
• 40MP front camera.
• 8K video recording.
• 5,000mAh typical battery.
• 5G cellular support.
• Wi-Fi 6E-compatible hardware.
• Bluetooth 5.2.
• NFC.
• USB Type-C.
• Wireless charging.
• Wireless PowerShare.
• S Pen input support.
• Samsung DeX support.
• IP68 water and dust resistance.

These capabilities are documented by Samsung for the Galaxy S21 Ultra 5G platform.

Package Contents

The referenced product is a renewed device, so included accessories can depend on the refurbisher or renewal program. Public records for this listing identify an adapter and USB cable among included media, but accessory configuration should not be assumed to match the original new-device retail package.

• Samsung Galaxy S21 Ultra 5G handset.
• Compatible charging or data accessories as supplied with the renewed unit.

Compatibility

The referenced configuration is identified as an unlocked U.S. Galaxy S21 Ultra 5G. U.S. Galaxy S21 Ultra hardware supports multiple GSM, UMTS, LTE, and 5G network technologies, although actual activation depends on carrier network bands, account policies, device status, and current carrier certification.

The device supports nano-SIM service and embedded-SIM functionality on supported software and networks. eSIM activation availability can vary by carrier.

Bluetooth 5.2 accessories, compatible Wi-Fi networks, NFC services, USB Type-C peripherals, Qi wireless charging devices, and supported Samsung DeX displays can be used with the phone when their own compatibility requirements are satisfied.

The Galaxy S21 Ultra supports S Pen input but does not contain an internal S Pen storage slot. Cases designed to hold an S Pen accessory are separate from standard cases.

Cases, screen protectors, camera protectors, and fitted accessories should specifically identify Galaxy S21 Ultra compatibility. Accessories designed for the smaller Galaxy S21 or Galaxy S21+ have different physical dimensions.

Frequently Asked Questions

What product does B096T6Y623 identify?

B096T6Y623 identifies a renewed Samsung Galaxy S21 Ultra 5G U.S.-version smartphone with 128GB of storage in Phantom Black and unlocked cellular service.

What model family is associated with this device?

The U.S. Galaxy S21 Ultra belongs to Samsung’s SM-G998U model family.

What manufacturer part number identifies the unlocked 128GB Phantom Black version?

Samsung identifies that configuration as SM-G998UZKAXAA.

What UPC does Samsung associate with SM-G998UZKAXAA?

Samsung’s U.S. business records list UPC 887276473345 for the unlocked 128GB Phantom Black configuration.

Is the referenced device new?

No. The B096T6Y623 product record identifies the device as renewed. The cosmetic condition, battery health, packaging, and supplied accessories can therefore vary from an original factory-sealed unit.

Is B096T6Y623 carrier unlocked?

Yes. The referenced configuration is identified as unlocked for U.S. use. Carrier activation remains subject to network compatibility and account requirements.

Can the storage be expanded with a microSD card?

No. The Galaxy S21 Ultra does not include a microSD memory-card slot. Local storage expansion therefore requires external or cloud-based storage rather than an internal memory card.

Does the Galaxy S21 Ultra support S Pen input?

Yes. The Galaxy S21 Ultra supports compatible S Pen input. Unlike later Ultra models with integrated stylus storage, this generation does not contain a built-in S Pen compartment.

Does it include an S Pen?

S Pen compatibility is a device feature, but an S Pen should not be assumed to be included with a renewed handset unless specifically documented with that individual unit.

Does the phone support 120Hz while using QHD+ resolution?

Yes. One major change in the Galaxy S21 Ultra generation was support for adaptive refresh operation up to 120Hz on its QHD+ display.

How does the telephoto camera system work?

The phone contains two telephoto cameras. One provides a 3x optical position for moderate magnification, while the second provides a 10x optical position for more distant subjects.

What does 100x zoom mean?

The phone can extend zoom electronically to approximately 100x. The highest magnification levels rely heavily on digital processing and should not be confused with the native 10x optical telephoto position.

Can the Galaxy S21 Ultra record 8K video?

Yes. Samsung specifies UHD 8K recording at 24 frames per second.

Does it support wireless charging?

Yes. The Galaxy S21 Ultra supports Qi-compatible wireless charging and Samsung’s Wireless PowerShare function.

What is Wireless PowerShare?

Wireless PowerShare allows the rear of the phone to provide wireless power to compatible Qi devices, such as certain earbuds, watches, and smartphones.

Does it have a headphone jack?

No. Wired audio accessories require a compatible USB Type-C connection or adapter. Bluetooth audio is also supported.

Does it support Wi-Fi 6E?

Yes. Samsung’s U.S. specifications include 2.4GHz, 5GHz, and 6GHz Wi-Fi operation using 802.11ax-compatible hardware.

Is the Galaxy S21 Ultra waterproof?

The phone carries an IP68 water- and dust-resistance rating under defined laboratory conditions. This rating does not mean the device is immune to all liquid exposure, and sealing can deteriorate after aging, impact damage, or repair.

Does a renewed Galaxy S21 Ultra retain its original water resistance?

Water-resistance performance should not be assumed for a renewed or previously repaired unit. Opening a device for repair can affect seals, so condition should be assessed individually.

Does the phone support eSIM?

Samsung’s U.S. specifications identify physical SIM plus embedded-SIM capability. Actual eSIM activation depends on carrier and software support.

Does it support Samsung DeX?

Yes. Samsung DeX is supported and can provide a desktop-style interface when connected using supported equipment and connection methods.

What operating system did the Galaxy S21 Ultra originally use?

The Galaxy S21 Ultra launched with Android-based Samsung software. A renewed unit may have a later supported software version depending on updates already installed.

How can the exact model be confirmed on the phone?

Open the device information section in system settings and compare the model number, serial number, IMEI, storage capacity, and software information. These values provide more reliable identification than the product name alone.

How should battery condition be evaluated on a renewed unit?

Observe charging behavior, standby drain, temperature, and runtime during normal use. Because lithium-ion capacity decreases with age and charge cycles, a renewed device may not provide the same runtime as a new unit.

What warranty applies to B096T6Y623?

The referenced listing is for a renewed product, so warranty coverage can differ from Samsung’s original new-device warranty. Warranty terms should be verified from the refurbisher or renewal provider associated with the specific unit.

Buying Considerations

• Confirm ASIN B096T6Y623 when identifying the referenced renewed configuration.
• Confirm that the phone reports 128GB of internal storage.
• Check that the exterior color is Phantom Black if matching the exact configuration.
• Verify the model number in the device settings rather than relying only on exterior appearance.
• Check the IMEI for carrier eligibility, loss or theft status, and financing restrictions where applicable.
• Confirm that account locks from previous owners have been removed.
• Evaluate battery health because the device generation dates to 2021.
• Inspect the AMOLED display for burn-in, discoloration, dead pixels, touch problems, and scratches.
• Inspect all camera lenses and test the 3x and 10x telephoto cameras individually.
• Test the USB Type-C port.
• Test cellular, Wi-Fi, Bluetooth, NFC, GPS, microphone, speaker, and fingerprint functions.
• Do not assume that a renewed unit retains its original IP68 sealing after previous repair.
• Confirm which charging accessories are included with the individual renewed unit.
• Remember that the device has no microSD card slot.
• Remember that S Pen support does not mean an S Pen is necessarily included.

Customer Feedback Summary

This section is a generalized summary of recurring public owner and independent-review feedback. It describes subjective experiences rather than verified product specifications.

The display is frequently cited as a major strength. Long-term evaluations commonly report smooth scrolling, strong brightness, high resolution, and useful adaptive refresh behavior. The combination of QHD+ resolution and 120Hz operation is often highlighted compared with earlier Galaxy generations.

The camera system also receives substantial positive feedback, particularly for its range of focal lengths. The dedicated 3x and 10x telephoto cameras are commonly valued for producing more usable distant-subject images than systems relying primarily on digital cropping.

Battery feedback is generally favorable but varies significantly with network strength, screen settings, camera use, gaming, and battery age. Public owner discussions include both strong endurance reports and examples of users experiencing shorter runtime, illustrating the effect of individual usage and device condition.

Physical size and weight are recurring limitations. Some users find the large display useful for media and productivity, while others consider the device difficult to operate comfortably with one hand or carry in smaller pockets.

The absence of expandable microSD storage is another commonly mentioned limitation, particularly among users who store large photo and video collections locally. S Pen support is generally viewed as useful, although the lack of an integrated stylus compartment makes storage less convenient than on later Ultra models.

Because B096T6Y623 represents a renewed device, condition-specific concerns can be more important than original launch reviews. Battery wear, display burn-in, cosmetic condition, camera focus, repair history, charging-port condition, and prior account status can vary between individual units.

Related Products

• Samsung Galaxy S20 Ultra 5G: Previous Ultra-generation Galaxy S model.
• Samsung Galaxy S21 5G: Smaller model in the same product generation.
• Samsung Galaxy S21+ 5G: Intermediate-size model in the Galaxy S21 family.
• Samsung Galaxy S21 Ultra 256GB: Higher-capacity version of the same device generation.
• Samsung Galaxy S21 Ultra 512GB: Highest-capacity version originally offered in the family.
• Samsung Galaxy S22 Ultra: Successor Ultra-generation model.
• Samsung S Pen: Compatible stylus family for supported Galaxy S21 Ultra functions.
• Galaxy S21 Ultra protective cases: Cases shaped specifically for the 6.8-inch Ultra chassis.
• Qi wireless chargers: Compatible wireless charging accessories.
• USB Type-C accessories: Compatible charging, data, and audio equipment.

Last Updated

August 8, 2026