Samsung Galaxy S26 Ultra 512GB Unlocked Smartphone – Black SM-S948UZKEXAA

Product Overview

The Samsung Galaxy S26 Ultra is a flagship Android smartphone introduced as part of Samsung’s 2026 Galaxy S series. The B0G4SW3XXP configuration corresponds to the U.S. unlocked model with 512GB of internal storage and a Black finish. Samsung identifies the unlocked hardware model as SM-S948U1 and the Black 512GB configuration as SM-S948UZKEXAA.

The device uses a 6.9-inch QHD+ Dynamic AMOLED 2X display with an adaptive refresh rate from 1 to 120Hz and peak brightness of 2,600 nits. The Ultra model also introduces Samsung’s integrated Privacy Display technology, which can reduce side-angle visibility when enabled. Processing is handled by the Snapdragon 8 Elite Gen 5 for Galaxy platform, paired with 12GB of memory in the 512GB configuration.

The rear camera system combines a 200-megapixel wide camera, 50-megapixel ultrawide camera, 10-megapixel 3x telephoto camera, and 50-megapixel 5x telephoto camera. Other documented hardware includes a 5,000mAh battery, an integrated S Pen, Wi-Fi 7, Bluetooth 6.0, Ultra Wideband connectivity, 5G support, IP68-rated water and dust resistance, and USB-C charging. The phone launched with Android 16 and Samsung One UI 8.5.

Product Information

Identification

Physical Information

Storage and Memory

Product Identifier Summary

Model Number

The model number identifies the underlying device platform and regional hardware configuration. SM-S948U1 is Samsung’s designation for the U.S. factory-unlocked Galaxy S26 Ultra.

MPN

A Manufacturer Part Number distinguishes a more specific commercial configuration. SM-S948UZKEXAA identifies the unlocked Black 512GB U.S. configuration.

UPC

A UPC is a 12-digit retail barcode used for inventory and product matching. An exact UPC for this configuration is omitted because it could not be independently verified with sufficient confidence.

EAN

An EAN is an international retail barcode within the GTIN system. No independently verified EAN specific to this U.S. configuration is included.

GTIN

A Global Trade Item Number is a standardized commercial identifier that can include UPC and EAN formats. No GTIN is listed because a verified barcode number for this exact configuration was not established.

ASIN

The ASIN identifies the specific catalog record associated with the Black 512GB unlocked Galaxy S26 Ultra researched for this page. It is separate from Samsung’s manufacturer-assigned model identifiers.

ISBN

ISBN identifiers apply to books and certain published works. They do not apply to smartphones.

Common Uses

• Voice calls and text messaging.
• 5G and LTE mobile data access.
• Web browsing and email.
• Photography and video recording.
• Mobile gaming.
• Streaming video and audio.
• GPS navigation.
• Note-taking with the integrated S Pen.
• Handwritten annotation and drawing.
• Document scanning.
• Mobile productivity and multitasking.
• Wireless payments through supported services.
• Galaxy AI-supported software functions.
• Connection to compatible Galaxy accessories and peripherals.

Maintenance and Care

The Galaxy S26 Ultra contains glass, electronic components, cameras, an internal rechargeable battery, and an integrated stylus. Routine care should reduce exposure to impacts, abrasive materials, excessive heat, salt water, chemicals, and debris around connectors or openings.

• Use a clean, soft, lint-free cloth for routine exterior cleaning.
• Disconnect cables before cleaning the device.
• Keep the USB-C port free of lint, liquid, and foreign objects.
• Avoid abrasive cleaners and rough materials on the display.
• Keep the S Pen slot free from debris before reinserting the stylus.
• Do not insert a wet S Pen into the device.
• Avoid prolonged exposure to excessive heat.
• Use compatible charging cables and power adapters.
• Inspect charging accessories periodically for worn insulation or connector damage.
• Back up important data before major software servicing or device repair.

Safety Information

The Galaxy S26 Ultra contains a rechargeable lithium-ion battery. Samsung specifies that compatible, approved charging equipment should be used and warns against damaged chargers or cables.

• Do not use a swollen, punctured, leaking, or otherwise damaged battery-powered device.
• Keep the phone away from fire and extreme heat.
• Do not puncture or attempt routine user removal of the internal battery.
• Use appropriate charging equipment and undamaged cables.
• Do not insert foreign objects into the USB-C port or S Pen compartment.
• Water and dust resistance can diminish through normal wear and physical damage.
• Rinse the device with fresh water and dry it thoroughly after accidental exposure to substances other than fresh water.
• Do not charge the device while the USB-C port is wet.

Technical Specifications

Privacy Display

The Galaxy S26 Ultra introduces an integrated Privacy Display system. When activated, the display limits visibility from side viewing angles while maintaining a normal forward-facing view for the person holding the phone.

The feature can be enabled or disabled in software rather than remaining permanently active. Samsung also provides options that apply privacy behavior to selected apps, notifications, password-entry situations, or portions of the screen.

Privacy Display changes how content appears from off-axis viewing positions and may affect image appearance when privacy modes are active. It is therefore a configurable privacy feature rather than a replacement for normal precautions when displaying sensitive information in public.

S Pen

The Galaxy S26 Ultra contains an S Pen that stores inside a dedicated slot in the phone. The stylus supports handwriting, drawing, Air Command, Air View, text entry, translation, screen annotation, magnification, and screen-off notes.

The S26 Ultra S Pen uses Wacom technology with 4,096 pressure levels. Unlike some earlier Ultra-generation S Pens, the S26 Ultra stylus does not use Bluetooth Low Energy and therefore does not support Bluetooth-based Air Actions.

The supplied S Pen does not require pairing or charging. It should be returned to its storage slot when not in use to reduce the likelihood of loss or physical damage.

Camera System

200 MP Main Camera

The primary wide-angle camera uses a 200-megapixel sensor with autofocus. It serves as the principal camera for standard photography and many computational imaging functions.

50 MP Ultrawide Camera

The ultrawide camera provides a wider field of view than the primary camera and includes autofocus. It can be used for wide scenes and supported close-range imaging functions.

3x Telephoto Camera

A 10-megapixel telephoto camera provides 3x optical zoom for subjects requiring a narrower field of view than the primary camera.

5x Telephoto Camera

A separate 50-megapixel telephoto camera provides 5x optical zoom. Samsung also documents 10x optical-quality zoom using its Adaptive Pixel processing system.

Video Recording

The rear camera system supports 8K recording at up to 30 frames per second. Pro Video supports 4K recording at up to 120 frames per second under supported settings.

Product History

Samsung announced the Galaxy S26, Galaxy S26+, and Galaxy S26 Ultra on February 25, 2026. General U.S. availability began on March 11, 2026.

The S26 Ultra succeeds the Galaxy S25 Ultra as Samsung’s high-end conventional Galaxy S-series smartphone. The 2026 model continues the integrated S Pen format while introducing Privacy Display technology, faster wired and wireless charging, and the Snapdragon 8 Elite Gen 5 for Galaxy processor.

The Galaxy S26 Ultra is available with 256GB, 512GB, and 1TB storage configurations. Samsung specifies 12GB of RAM for the 256GB and 512GB versions, while the 1TB configuration uses 16GB in supported markets.

Key Features

• 6.9-inch QHD+ Dynamic AMOLED 2X display.
• Adaptive refresh rate from 1 to 120Hz.
• 2,600-nit documented peak brightness.
• Integrated Privacy Display technology.
• Snapdragon 8 Elite Gen 5 for Galaxy processor.
• 12GB RAM in the 512GB configuration.
• 512GB internal storage.
• 200 MP primary rear camera.
• 50 MP ultrawide camera.
• 3x and 5x optical telephoto cameras.
• Up to 100x digital zoom.
• 8K video recording.
• Integrated S Pen.
• 5,000mAh typical battery capacity.
• Up to 60W wired charging.
• Up to 25W wireless charging.
• Wireless PowerShare.
• Wi-Fi 7.
• Bluetooth 6.0.
• Ultra Wideband connectivity.
• 5G support.
• IP68 water and dust resistance.
• Android 16 at launch.
• One UI 8.5 at launch.
• Seven years of security update support announced for the Galaxy S26 series.

Package Contents

• Samsung Galaxy S26 Ultra smartphone.
• Integrated S Pen.
• USB Type-C 3A charging/data cable.
• SIM ejector tool.

A wall power adapter is not part of Samsung’s standard Galaxy S26 Ultra box. The manufacturer specifies that a compatible 60W charger is required to access the phone’s maximum documented wired charging capability.

Compatibility

U.S. Cellular Networks

The researched configuration is Samsung’s U.S. factory-unlocked model. Cellular operation still depends on carrier-supported bands, network provisioning, account eligibility, and service availability.

5G Networks

The U.S. Galaxy S26 Ultra supports both sub-6 GHz and millimeter-wave 5G technologies. Actual 5G availability and performance depend on the carrier and location.

Wi-Fi Networks

The phone supports Wi-Fi 7 as well as compatibility with supported earlier Wi-Fi generations. Wi-Fi 7 operation requires compatible network hardware.

Bluetooth Accessories

Bluetooth 6.0 supports compatible headphones, speakers, vehicle systems, keyboards, controllers, wearables, and other Bluetooth peripherals.

Wireless Charging

The phone supports wireless charging through compatible WPC-based charging equipment. Maximum charging speed depends on the charging accessory and operating conditions.

Wireless PowerShare

Wireless PowerShare can transfer battery power to compatible Qi-enabled smartphones and selected Galaxy wearable devices. Cases, alignment, temperature, and remaining phone battery level can affect operation.

S Pen Compatibility

The included S Pen is designed for the Galaxy S26 Ultra. Samsung also identifies S26 Ultra and S25 Ultra S Pen compatibility within this generation, but Bluetooth Air Actions are not supported by the S26 Ultra S Pen.

Memory Cards

The Galaxy S26 Ultra does not include a microSD memory-card slot. Storage expansion therefore relies on internal storage, connected storage devices, computers, or cloud services.

Frequently Asked Questions

What phone is B0G4SW3XXP?

B0G4SW3XXP corresponds to the Samsung Galaxy S26 Ultra with 512GB of storage in Black, configured for the U.S. unlocked market.

What is the model number?

The U.S. factory-unlocked Galaxy S26 Ultra uses model number SM-S948U1.

What is the specific Black 512GB part number?

Samsung identifies the unlocked Black 512GB configuration as SM-S948UZKEXAA.

How much storage does this configuration have?

The researched configuration includes 512GB of internal flash storage.

How much RAM does the 512GB version have?

The Galaxy S26 Ultra 512GB configuration has 12GB of RAM.

Does it support a microSD card?

No. External microSD storage is not supported.

What operating system does it use?

The Galaxy S26 Ultra launched with Android 16 and Samsung One UI 8.5.

When was the Galaxy S26 Ultra released?

Samsung announced the Galaxy S26 series on February 25, 2026, with general U.S. availability beginning March 11, 2026.

Is B0G4SW3XXP unlocked?

Yes. This catalog configuration corresponds to Samsung’s U.S. unlocked Galaxy S26 Ultra.

Does unlocked mean it works with every carrier?

No. An unlocked phone is not restricted to one carrier, but activation still requires compatible network technology, frequency bands, provisioning, and carrier policies.

Does it support 5G?

Yes. The U.S. model supports both sub-6 GHz and millimeter-wave 5G technologies.

Does it support LTE?

Yes. LTE connectivity is supported.

Does it support Wi-Fi 7?

Yes. A compatible Wi-Fi 7 network is required to use Wi-Fi 7 capabilities.

Does it have Bluetooth?

Yes. The documented Bluetooth version for the Galaxy S26 Ultra is Bluetooth 6.0.

Does it support Ultra Wideband?

Yes. Ultra Wideband connectivity is included.

How large is the screen?

The screen measures 6.9 inches diagonally across the full rectangular area. The usable viewing area is slightly smaller because of rounded corners and the front-camera opening.

What display technology does it use?

The Galaxy S26 Ultra uses a QHD+ Dynamic AMOLED 2X display.

What is the refresh rate?

The display uses an adaptive refresh range from 1Hz to 120Hz.

What is Privacy Display?

Privacy Display is an integrated display feature that reduces screen visibility from side angles when enabled. The owner can activate it for broader screen content or selected privacy-sensitive situations.

Is Privacy Display always active?

No. It can be turned on or off through device settings.

Does Privacy Display replace normal security precautions?

No. It can reduce side-angle viewing but does not guarantee that sensitive information cannot be observed under every condition.

What processor does the S26 Ultra use?

The U.S. Galaxy S26 Ultra uses the Snapdragon 8 Elite Gen 5 for Galaxy mobile platform.

How many rear cameras does it have?

The device has four primary rear camera modules: wide, ultrawide, 3x telephoto, and 5x telephoto.

What is the main camera resolution?

The primary wide-angle rear camera uses a 200-megapixel sensor.

What is the ultrawide camera resolution?

The ultrawide camera uses a 50-megapixel sensor with autofocus.

Does it have optical zoom?

Yes. Dedicated telephoto cameras provide 3x and 5x optical zoom.

What does 10x optical-quality zoom mean?

Samsung distinguishes 10x optical-quality zoom from true dedicated 10x optical zoom. It uses sensor and image-processing techniques rather than a separate 10x optical lens.

What is the maximum digital zoom?

The documented maximum is 100x digital zoom.

Can it record 8K video?

Yes. Rear-camera video recording supports up to 8K at 30 frames per second.

Can it record 4K at 120 fps?

Yes. Samsung documents 4K at 120 frames per second within Pro Video mode.

What is the front camera resolution?

The front-facing autofocus camera uses a 12-megapixel sensor.

What is the battery capacity?

The battery has a typical capacity of 5,000mAh and a documented rated minimum capacity of 4,855mAh.

How fast can it charge by cable?

The Galaxy S26 Ultra supports Super Fast Charging 3.0 at up to 60 watts with compatible equipment.

Is a 60W charger included?

No. Samsung’s standard box does not include a wall power adapter.

Is a USB-C cable included?

Yes. Samsung documents a USB Type-C 3A cable among the standard box contents.

Does it support wireless charging?

Yes. Supported wireless charging can operate at up to 25 watts with compatible equipment.

Does it have reverse wireless charging?

Yes. Samsung calls the feature Wireless PowerShare.

Is the phone waterproof?

Samsung rates the Galaxy S26 Ultra IP68 for water and dust resistance under specified laboratory conditions. Water resistance is not permanent and should not be interpreted as making the phone waterproof under all conditions.

What does IP68 mean for this phone?

Samsung’s testing covers immersion in up to 1.5 meters of fresh water for as long as 30 minutes under controlled laboratory conditions, along with dust-tight protection.

Can it be used in salt water?

The IP68 laboratory rating is based on fresh water. Salt water and other liquids can be more corrosive and should not be treated as equivalent to the test conditions.

Does it include an S Pen?

Yes. The S Pen is integrated into the phone and stored in a dedicated slot.

Does the S Pen need charging?

No. Samsung states that the Galaxy S26 Ultra S Pen does not require charging.

Does the S26 Ultra S Pen use Bluetooth?

No. The S26 Ultra S Pen does not use Bluetooth Low Energy.

Does the S Pen support Air Actions?

Bluetooth-based Air Actions are not supported. Other S Pen functions such as Air Command, Air View, handwriting, drawing, translation, and screen annotation remain available.

How many pressure levels does the S Pen support?

Samsung documents 4,096 pressure levels.

Can the S Pen write while the screen is off?

Yes. Screen Off Memo allows notes or drawings to be created after removing the S Pen while the display is off.

Does it support Samsung DeX?

The Galaxy S Ultra product family supports Samsung’s connected productivity environment. Compatibility with a particular display, cable, computer, or wireless setup depends on current Samsung DeX software support and accessory requirements.

Does it have a headphone jack?

No conventional 3.5 mm headphone jack is part of the Galaxy S26 Ultra hardware. Wired audio requires a compatible USB-C solution.

Does it have removable storage?

No. The phone does not provide a microSD slot.

Can USB storage be connected?

Compatible USB-C storage devices can be used when supported by Android, the storage format, power requirements, and the connected accessory.

Does it receive long-term software support?

Samsung announced seven years of security update support for the Galaxy S26 series.

Does a one-year warranty apply?

Warranty coverage depends on the device’s country, sales channel, warranty eligibility, and Samsung’s applicable terms. For a U.S. model, the serial number and purchase documentation should be used to confirm current coverage.

How can the exact configuration be identified?

Check the model number, storage capacity, color, manufacturer part number, device settings, original packaging, and regulatory labels. For this configuration, the important identifiers include SM-S948U1 and SM-S948UZKEXAA.

Buying Considerations

512GB Fixed Storage

The phone provides substantial internal storage but does not accept microSD cards. Users requiring removable storage should account for this before relying on local storage alone.

Large Physical Size

The 6.9-inch display results in a relatively large smartphone body. Hand comfort, pocket size, case dimensions, and one-handed operation can therefore differ from smaller Galaxy S models.

S Pen Functionality

The integrated S Pen supports handwriting and productivity features, but Bluetooth-based remote Air Actions are not part of this generation. Users moving from older Ultra models with Bluetooth S Pens should account for that change.

Maximum Charging Speed

The phone supports up to 60W wired charging, but the required power adapter is sold separately. Cable and charger compatibility affect actual charging speed.

Privacy Display

The integrated privacy system is distinctive to the Ultra model, but activating privacy modes changes viewing behavior. Users who prioritize unrestricted viewing angles should consider how often they expect to use the feature.

Camera Configuration

The camera system provides separate 3x and 5x optical telephoto lenses rather than a dedicated 10x optical lens. Samsung labels 10x as optical-quality zoom through its imaging system.

Unlocked Network Compatibility

Factory unlocking allows use across compatible networks but does not guarantee activation on every carrier. Current carrier support should be verified using the exact SM-S948U1 model number.

Wall Charger

A wall adapter is not included in Samsung’s standard package. Existing chargers may provide lower charging rates if they do not support the required charging protocol and output.

Customer Feedback Summary

This section summarizes recurring themes reported in publicly available owner discussions and independent product evaluations. These observations are subjective and are not verified product specifications.

Commonly Praised Aspects

• Users and reviewers frequently describe overall processor performance as fast and responsive.
• The 6.9-inch display is commonly praised for its size, smooth adaptive refresh rate, and outdoor visibility.
• Privacy Display receives positive comments from users who frequently view sensitive information in public environments.
• The main and telephoto cameras are often praised for detail, flexibility, and low-light improvements.
• Battery endurance is commonly described as adequate for extended daily use, although results vary by workload.
• The faster 60W wired charging system receives favorable comments compared with earlier Ultra models.
• The thinner body is frequently noted as making the large phone somewhat easier to handle.
• The integrated S Pen remains useful for handwriting, annotation, drawing, and productivity tasks.

Commonly Reported Limitations

• Some users report that Privacy Display can change perceived image quality or viewing behavior when activated.
• The absence of Bluetooth-based S Pen Air Actions remains a limitation for users familiar with older Ultra-generation S Pens.
• Some users consider the 5,000mAh battery capacity conservative compared with competing large Android phones.
• Camera improvements can feel incremental to owners upgrading from recent Galaxy Ultra models.
• The large physical dimensions can be uncomfortable for users who prefer compact phones.
• The lack of a microSD slot continues to limit removable-storage options.
• The lack of a wall charger in the standard package requires separate compatible charging hardware for users who do not already own one.
• Some users report that heavy gaming, camera use, or maximum display settings can noticeably increase heat and battery consumption.

Battery life, camera results, display perception, network performance, and device temperature vary substantially with applications, settings, signal conditions, accessories, and usage patterns. These feedback themes should therefore not be interpreted as fixed specifications.

Related Products

• Samsung Galaxy S26: Smaller 6.3-inch model in the same 2026 Galaxy S series.
• Samsung Galaxy S26+: 6.7-inch Galaxy S26 model positioned between the standard and Ultra configurations.
• Samsung Galaxy S25 Ultra: Previous-generation Ultra model and direct predecessor to the Galaxy S26 Ultra.
• Samsung Galaxy S26 Ultra 256GB: Lower-capacity configuration using the same Ultra platform.
• Samsung Galaxy S26 Ultra 1TB: Higher-capacity configuration with 16GB RAM in supported markets.
• Samsung Galaxy Buds4: Wireless earbuds from the same 2026 Galaxy generation.
• Samsung Galaxy Buds4 Pro: Higher-tier wireless earbuds designed for integration with compatible Galaxy devices.

Last Updated

August 9, 2026