Samsung Galaxy Z Fold4 5G 256GB Phantom Black Factory Unlocked Smartphone SM-F936UZAAXAA

Product Overview

The Samsung Galaxy Z Fold4 identified by ASIN B0B3TBBKQ8 is a factory-unlocked U.S.-version foldable Android smartphone with 256GB of internal storage, 12GB of RAM, and a Phantom Black finish. Samsung introduced the model in 2022 as the fourth major generation of its book-style Galaxy Z Fold family.

The device combines a 6.2-inch external display with a 7.6-inch foldable main display. Both use Dynamic AMOLED 2X technology and support adaptive refresh rates up to 120Hz. When opened, the larger screen is designed for multitasking, document viewing, media playback, supported S Pen input, and applications optimized for foldable displays.

Processing is handled by the Qualcomm Snapdragon 8+ Gen 1 platform. The rear camera system includes a 50MP wide camera, 12MP ultra-wide camera, and 10MP telephoto camera with 3x optical zoom. Separate cameras are provided on the cover screen and beneath the main display.

The Galaxy Z Fold4 uses a 4,400mAh typical dual-battery system and supports wired fast charging, wireless charging, and Wireless PowerShare. Other documented features include 5G, Wi-Fi 6E, Bluetooth 5.2, NFC, eSIM support, a side-mounted fingerprint sensor, Samsung Knox security, and IPX8 water resistance.

Product Information

Identification

Physical

Product Identifier Summary

• Model Number: The model number distinguishes a hardware and regional version of the Galaxy Z Fold4. It is commonly used for carrier checks, firmware, repairs, accessories, and technical support.
• MPN: The manufacturer part number identifies a particular manufacturer-defined configuration, including regional, storage, and color characteristics.
• UPC: The Universal Product Code is a 12-digit retail barcode used by inventory, catalog, and product-identification systems.
• EAN: EAN is an international retail identification format within the GTIN system. A separate EAN was not included because one could not be independently verified for this exact U.S. configuration.
• GTIN: Global Trade Item Number is the broader product-identification system that includes UPC and EAN formats. A UPC can function as a GTIN-12.
• ASIN: B0B3TBBKQ8 identifies the referenced commercial product record and distinguishes it from other storage, color, carrier, and condition variations.
• ISBN: ISBN identifiers are used for books and qualifying publications and do not apply to smartphones.

Common Uses

• Voice calls and text messaging.
• 5G and LTE mobile internet access.
• Email and web browsing.
• Video conferencing.
• Running multiple supported applications on the main display.
• Viewing documents and spreadsheets.
• Mobile productivity and remote-work applications.
• Streaming movies, television programs, and online video.
• Mobile gaming.
• Photography and video recording.
• Optical telephoto photography.
• Navigation and location-based applications.
• Handwritten notes and drawing with a compatible S Pen.
• Document annotation.
• Contactless functions through NFC.
• Wireless charging of compatible accessories through Wireless PowerShare.

Maintenance and Care

The foldable main display requires more careful handling than a conventional rigid smartphone screen. Avoid pressing the flexible display with fingernails, pens, keys, or other hard or pointed objects.

Do not remove the factory-installed protective layer from the main foldable display unless directed by an authorized service provider. Additional adhesive films not specifically designed for the device can interfere with the folding screen.

Clean the exterior and displays using a soft, dry, lint-free cloth. Abrasive cleaners, solvents, excessive moisture, and rough materials can damage coatings or surfaces.

Keep the hinge area, USB Type-C port, speakers, microphones, and SIM tray free from sand, dirt, and other debris. The device has an IPX8 water-resistance rating but does not carry a dust-resistance rating.

Use compatible charging equipment and undamaged cables. Avoid prolonged exposure to extreme heat because elevated temperatures can accelerate battery degradation and affect electronic components.

Important files should be backed up regularly. Operating-system and security updates should be installed when available for the exact regional model.

Safety Information

• The Galaxy Z Fold4 contains a rechargeable dual-cell lithium-ion battery system that is not intended for routine user removal.
• Do not puncture, crush, burn, or deliberately disassemble the battery or device.
• Stop using the phone if the battery becomes swollen, physically damaged, or unusually hot.
• The Galaxy Z Fold4 carries an IPX8 water-resistance rating under specified laboratory test conditions.
• IPX8 testing covers freshwater submersion up to 1.5 meters for up to 30 minutes.
• The device is not rated for dust resistance.
• Beach and pool use are not covered by the documented IPX8 test conditions.
• Water resistance can decline because of normal wear, impacts, repairs, or deterioration of seals.
• Only the main display supports compatible S Pen input.
• Samsung specifies the S Pen Fold Edition and S Pen Pro for use with the Galaxy Z Fold4 main screen.
• Other styluses can damage the flexible display if they are not designed for the Galaxy Z Fold4.

Technical Specifications

Product History

Samsung announced the Galaxy Z Fold4 on August 10, 2022 as the fourth major generation of its Galaxy Fold-style smartphone family. General U.S. availability began on August 26, 2022.

The Galaxy Z Fold4 succeeded the Galaxy Z Fold3. Samsung changed the device proportions, reduced overall weight, revised the hinge system, and introduced a wider cover display while retaining the book-style folding design.

The fourth-generation model also introduced a 50MP main rear camera and Qualcomm’s Snapdragon 8+ Gen 1 platform. It became the first smartphone released with Android 12L, a version of Android developed with large-screen and foldable devices in mind.

Samsung offered the Galaxy Z Fold4 with 256GB, 512GB, and selected 1TB storage configurations. Phantom Black, Graygreen, Beige, and selected-market Burgundy versions were produced.

The Galaxy Z Fold5 succeeded the Galaxy Z Fold4 in 2023. Later Fold generations continued Samsung’s large-screen book-style foldable product family.

Key Features

• Book-style foldable smartphone design.
• 7.6-inch Dynamic AMOLED 2X main display.
• 6.2-inch Dynamic AMOLED 2X cover display.
• Adaptive refresh rates up to 120Hz.
• Snapdragon 8+ Gen 1 mobile platform.
• 12GB RAM.
• 256GB internal storage.
• 50MP main rear camera.
• 12MP ultra-wide rear camera.
• 10MP telephoto rear camera.
• 3x optical telephoto zoom.
• 30x Space Zoom capability.
• 10MP cover-screen camera.
• 4MP under-display camera.
• 4,400mAh typical dual battery.
• 25W-class Super Fast Charging support.
• Fast Wireless Charging 2.0.
• Wireless PowerShare.
• 5G connectivity.
• Wi-Fi 6E.
• Bluetooth 5.2.
• NFC connectivity.
• Physical Nano-SIM and eSIM support.
• S Pen Fold Edition and S Pen Pro compatibility.
• IPX8 water resistance.
• Armor Aluminum frame and hinge cover.
• Gorilla Glass Victus+ on the cover screen and rear glass.
• Samsung Knox and Knox Vault security.

Package Contents

• Samsung Galaxy Z Fold4 smartphone.
• USB Type-C cable.
• SIM-ejection tool.

A compatible wall charging adapter and S Pen are not part of the standard phone package for this configuration. Package contents can differ when the phone is supplied as part of a separate accessory bundle.

Compatibility

The referenced configuration is a factory-unlocked U.S. Galaxy Z Fold4. Cellular compatibility still depends on the exact network bands, carrier certification, SIM provisioning, service plan, and network availability.

The U.S. unlocked version belongs to the SM-F936U1 model family. The device model and IMEI should be used when confirming activation with a particular wireless carrier.

The phone supports both 5G and LTE cellular service. Available frequencies and network capabilities vary by carrier and geographic region.

A physical Nano-SIM and eSIM are supported. eSIM activation depends on software, region, and wireless-carrier support.

The Galaxy Z Fold4 does not include a microSD card slot. Additional storage therefore requires cloud services, compatible USB storage, network storage, or another external method.

S Pen support is limited to the foldable main display. Samsung specifies compatibility with the S Pen Fold Edition and S Pen Pro rather than conventional Galaxy Note or Galaxy S-series S Pens.

Cases, screen protectors, and fitted accessories should specifically identify Galaxy Z Fold4 compatibility. Accessories designed for the Z Fold3, Z Fold5, or other Fold generations should not be assumed to fit correctly.

Frequently Asked Questions

What does B0B3TBBKQ8 identify?

B0B3TBBKQ8 identifies the referenced Samsung Galaxy Z Fold4 U.S.-version configuration with 256GB storage, Phantom Black finish, and factory-unlocked cellular status.

What UPC is associated with B0B3TBBKQ8?

The verified UPC associated with the referenced configuration is 887276666204.

What model number is associated with this Galaxy Z Fold4?

The factory-unlocked U.S. Galaxy Z Fold4 belongs to the SM-F936U1 model family. The referenced Phantom Black 256GB configuration is associated with manufacturer part number SM-F936UZAAXAA.

How is the Galaxy Z Fold4 different from a conventional smartphone?

The device has a book-style hinge and a flexible internal display. It can operate through its external cover screen while folded or provide a larger tablet-like workspace when opened.

Can the Galaxy Z Fold4 be used without opening it?

Yes. The cover display provides normal smartphone functions, including supported applications, calls, messaging, navigation, and camera controls.

Can multiple applications appear on the main screen?

Yes. Android 12L and Samsung’s foldable interface provide multitasking functions that can display supported applications in split-screen or pop-up layouts.

Does the Galaxy Z Fold4 support the S Pen?

Yes, but S Pen input is limited to the main foldable screen. Samsung specifies the S Pen Fold Edition and S Pen Pro as compatible models.

Is an S Pen included with the phone?

No. The S Pen was offered separately or as part of certain accessory bundles, including Samsung’s Standing Cover with Pen.

Can a standard Galaxy Note S Pen be used?

Samsung does not specify conventional Galaxy Note or standard smartphone S Pens for the Z Fold4 flexible display. Unsupported styluses can apply excessive pressure to the screen.

Does the Galaxy Z Fold4 have a built-in S Pen slot?

No. The phone itself does not contain an integrated S Pen storage compartment. Compatible cases can provide external pen storage.

Can storage be expanded with a microSD card?

No. The Galaxy Z Fold4 does not contain a microSD memory-card slot.

How much RAM is included?

The Galaxy Z Fold4 256GB configuration contains 12GB of RAM.

Does the Galaxy Z Fold4 support 5G?

Yes. The device supports 5G cellular connectivity, subject to carrier compatibility, service availability, network coverage, and supported frequencies.

Will the unlocked version work with every carrier?

Not automatically. Factory-unlocked status removes a carrier lock, but the device must still meet the network and provisioning requirements of the intended carrier.

Does the Galaxy Z Fold4 support eSIM?

Yes. eSIM is supported on compatible configurations, but availability and activation depend on carrier and software support.

Does it support Wi-Fi 6E?

Yes. Wi-Fi 6E connectivity is supported when used with compatible network equipment and available spectrum.

Does the phone support NFC?

Yes. NFC can be used by compatible contactless, pairing, and device-interaction applications.

Does it support wireless charging?

Yes. The Galaxy Z Fold4 supports Fast Wireless Charging 2.0 with compatible equipment.

What is Wireless PowerShare?

Wireless PowerShare allows compatible Qi-enabled devices and accessories to receive wireless power from the back of the phone.

Does the Galaxy Z Fold4 support fast wired charging?

Yes. Samsung specifies Super Fast Charging with a compatible 25W power adapter or higher. Charging speed varies with battery level, temperature, device activity, and charging equipment.

Is a 25W charger included?

No. Samsung’s standard phone package does not include the wall power adapter.

Is the Galaxy Z Fold4 waterproof?

The device has an IPX8 water-resistance rating rather than a guarantee of permanent waterproofing. It should still be protected from unnecessary liquid exposure.

Is the Galaxy Z Fold4 dust resistant?

No certified dust-resistance rating is specified. The letter X in IPX8 indicates that the rating does not provide a certified dust-protection level.

Should the main screen protector be removed?

The factory-installed protective layer is part of the foldable display system. It should not be casually removed, and display-film service should follow Samsung’s applicable service guidance.

How many rear cameras are included?

The rear camera assembly contains three cameras serving wide, ultra-wide, and telephoto functions.

What is 30x Space Zoom?

Space Zoom combines the telephoto camera’s 3x optical zoom with digital processing to provide magnification up to 30x. Image detail generally decreases as digital magnification increases.

Why does the phone have two front-facing cameras?

A conventional 10MP camera serves the cover display, while a 4MP camera is positioned beneath the main foldable screen for supported video and imaging functions when the phone is open.

What operating system originally shipped with the Galaxy Z Fold4?

The Galaxy Z Fold4 launched with Android 12L and Samsung One UI 4.1.1. Updated devices may run later supported software versions.

How can the exact Galaxy Z Fold4 configuration be identified?

Check the model number, storage capacity, IMEI, color, and software information directly in the device settings and on applicable regulatory or packaging labels.

What warranty is associated with the referenced configuration?

The referenced new U.S. product configuration documents a one-year manufacturer warranty. Actual coverage depends on eligibility, purchase documentation, region, and Samsung’s applicable warranty terms.

Buying Considerations

• Confirm that the phone is the U.S. factory-unlocked SM-F936U1 version if U.S. carrier support is required.
• Verify the IMEI with the intended carrier before activation when possible.
• The 256GB configuration does not provide a microSD expansion slot.
• The foldable main screen requires more careful handling than a conventional rigid glass display.
• The main-screen protective layer should not be treated as a conventional removable screen protector.
• Only compatible foldable-screen S Pens should be used on the main display.
• An S Pen is not stored inside the phone.
• A wall charging adapter is not included in the standard package.
• IPX8 indicates water resistance but not certified dust resistance.
• Sand, dirt, and debris should be kept away from the hinge mechanism.
• The folded device is substantially thicker than a conventional non-folding smartphone.
• The 263 g device weight is relevant for extended one-handed use.
• Cases should be designed specifically for the Galaxy Z Fold4 hinge, camera layout, and body dimensions.
• Wireless charging performance can be affected by thick or incompatible cases.
• Available user storage is lower than the nominal 256GB capacity because system software occupies part of the internal memory.

Customer Feedback Summary

This section is a generalized summary of recurring themes reported in publicly available customer discussions and independent evaluations. These observations are not verified product specifications, and individual experiences can vary.

The large internal display is frequently identified as the Galaxy Z Fold4’s defining practical feature. Users commonly describe the unfolded screen as useful for reading, video, maps, web browsing, document work, and viewing several applications at once.

Multitasking receives recurring positive feedback. The taskbar and split-screen functions allow compatible applications to use the larger display more effectively than on conventional smartphone screens.

The 50MP main camera and 3x telephoto camera are commonly viewed as meaningful improvements over the previous Fold generation. The rear camera system provides greater flexibility for normal, wide-angle, and distant subjects.

Users interested in handwriting and productivity frequently mention S Pen support positively. A recurring limitation is that the stylus is not included with the standard phone and cannot be stored inside the device itself.

The phone’s physical size and weight receive mixed feedback. The cover display makes the device usable while folded, but the folded body is thicker and heavier than most conventional smartphones.

Long-term discussions about foldable devices also commonly focus on the main-screen protective layer, hinge cleanliness, and flexible-display durability. These parts require more careful handling than rigid-screen smartphones and may require specialized service if damaged.

Battery feedback varies with workload. The dual-screen design, large main display, 5G connections, gaming, navigation, camera use, and multitasking can significantly influence daily runtime.

Related Products

• Samsung Galaxy Z Fold3 5G: Previous-generation model in Samsung’s book-style foldable family.
• Samsung Galaxy Z Fold5: Direct successor to the Galaxy Z Fold4.
• Samsung Galaxy Z Flip4: Compact clamshell foldable introduced alongside the Z Fold4.
• Samsung Galaxy Z Fold4 512GB: Higher-storage configuration of the same generation.
• Samsung Galaxy Z Fold4 1TB: Highest-capacity original storage configuration offered in selected markets.
• S Pen Fold Edition: Stylus designed for compatible Galaxy Fold main displays.
• S Pen Pro: Larger Samsung stylus compatible with supported Galaxy devices, including the Z Fold4 main display.
• Galaxy Z Fold4 Standing Cover with Pen: Model-specific case designed to carry a compatible S Pen.
• Galaxy Z Fold4 Protective Standing Cover: Protective case designed for the Z Fold4 form factor.
• Compatible USB-C charging adapters: Charging equipment for the phone’s supported wired charging functions.

Last Updated

August 7, 2026