5G Dynamic AM-OLED Smartphone

Samsung SM-F721C Galaxy Z Flip 4 5G UW TD-LTE JP 128GB (Samsung B4)

Samsung · Announced Aug 2022

About Samsung Galaxy Z Flip 4 5G

The Samsung Galaxy Z Flip 4 5G presents a compact form factor that measures just under 72 mm wide, 165 mm tall and 6.9 mm thick, weighing in at a light 187 grams. On its front lies a small colour AM‑OLED panel, 1.9 inches across with a resolution of 512 × 260 pixels, providing glance‑able information without needing to unfold the device. This secondary screen sits alongside the phone’s hinge, reinforcing the flip‑style aesthetic that the model is known for while keeping the overall footprint pocket‑friendly.

Inside, the handset runs Google Android 12 and is equipped with 8 GiB of RAM, ensuring smooth multitasking and app performance. Power comes from a 3 700 mAh battery that supports 15 watt wired charging, allowing a decent top‑up time when plugged in. Connectivity is handled via a single SIM slot, and the device retains the 5G capability indicated in its name. Together, these specifications deliver a balanced blend of portability, display convenience and everyday usability for users seeking a foldable smartphone.

This variant

This variant is the Japan‑market model of the Galaxy Z Flip 4 5G, distinguished by its 128 GB internal storage and the absence of any special‑edition or carrier branding. Its spec sheet notes a Linux kernel version of 5.10.81, a detail not mentioned in the base model’s description.

Compared with the other JP‑specific versions, it lacks the BTS Edition label found on the SM‑F721C BTS variant and the SCG17 carrier tag present on the SM‑F721J model. Against the broader lineup, it stands apart by being earmarked for Japan (JP) rather than the US, Korea, Canada or global markets, and by offering 128 GB storage where many alternatives provide 256 GB or 512 GB options. All core hardware—display, dimensions, weight, RAM, battery, charging and 5G connectivity—remains identical to the base Galaxy Z Flip 4 5G.

Technical Specifications

Display

Size

1.9 inch

Type

Dynamic AM-OLED

Resolution

512x260

Color depth

24-bit, 10-bit HDR

Panel

Samsung

Screen-to-body

85.6%

Active area

64.48 × 157.62 mm

Touch

Capacitive multi-touch sensing screen, 10-point

Punch-hole

Yes

Performance

Processor

Snapdragon 8+ Gen 1 5G

CPU

Octa-core, up to 3.2 GHz

GPU

Qualcomm Adreno 730

Process

4 nm

Platform

Google Android

Kernel

5.10.81

Memory

RAM

8 GiB

Battery

Capacity

3700 mAh

Type

Lithium-ion

Energy

14.36 Wh

Voltage

3.88 V

Cells

2 cells in parallel

Charging

15W

Cameras

Main

4000×3000 · 1× optical visibility

Main

visibility

Front

3648×2736 visibility

Dimensions

Size

71.9 × 165.2 × 6.9 mm

Weight

187 g

Connectivity

Wi-Fi

Wi-Fi 6

Wi-Fi services

DLNA, Miracast, Wi-Fi Direct, Wi-Fi Tethering, Wi-Fi Calling (VoWiFi)

Bluetooth profiles

A2DP, A2DP with aptX codec, A2DP with aptX HD codec, AVRCP, DIP, GAVDP, HFP, HID, HSP, MAP, OPP, PAN, PBA

USB

USB Type-C reversible

USB services

USB charging, USB fast charging, USB Host, USB On-The-Go 1.3, USB On-The-Go 2.0, USB Power Delivery, USB Power Delivery 2.0

NFC

NFC A, NFC B

GPS

GPS, GLONASS, Galileo, BeiDou, QZSS

GPS services

Simultaneous GPS (S-GPS), Assisted GPS, Geotagging, QuickGPS, QZSS

NR · 2 bandsTD-NR · 5 bandsLTE · 14 bandsTD-LTE · 5 bandsUMTS · 2 bandsGSM · 4 bands

All NR bands (2)

NR 1800 MHz (N3)
NR 700 MHz (N28)

All TD-NR bands (5)

TD-NR 2500 MHz (N41)
TD-NR 28 GHz (N257) bands
TD-NR 3500 MHz (N78)
TD-NR 3700 MHz (N77)
TD-NR 4700 MHz (N79)

All LTE bands (14)

LTE 1500 MHz (Band XXI)
LTE 1700/2100 MHz (Band 4, AWS)
LTE 1800 MHz (Band 3)
LTE 2100 MHz (Band 1)
LTE 2600 MHz (Band 7)
LTE 700 MHz (Band 12)
LTE 700 MHz (Band 13)
LTE 700 MHz (Band 28)
LTE 800 MHz (Band 18)
LTE 800 MHz (Band 19)
LTE 800 MHz (Band 20)
LTE 850 MHz (Band 26)
LTE 850 MHz (Band 5)
LTE 900 MHz (Band 8)

All TD-LTE bands (5)

TD-LTE 1900 MHz (Band 39)
TD-LTE 2300 MHz (Band XL)
TD-LTE 2500 MHz (Band XLI)
TD-LTE 2600 MHz (Band 38)
TD-LTE 3500 MHz (Band XLII)

All UMTS bands (2)

UMTS 2100MHz (Band I, IMT)
UMTS 850MHz (Band V, CLR)

All GSM bands (4)

GSM 1800MHz (B3)
GSM 1900MHz (PCS, B2)
GSM 850MHz (B5)
GSM 900MHz (B8)

Audio

Channels

stereo

Output

USB Type-C

Sensors

Accelerometer, Barometer, Compass, Fingerprint sensor, Gyroscope, Hall sensor, Light intensity sensor, Proximity sensor

Features

Fingerprint

Yes (fingerprint sensor)

SIM

e-SIM (embedded), Nano-SIM (4FF)

Carrier

Rakuten Mobile

Markets

Asia (Japan)

Extras

Haptic touch feedback, Foldable screen

Software extras

Voice Command, Business card recognition, Navigation software, Augmented Reality (AR), Virtual Reality (VR) support, Intelligent personal assistant, Voice Recognition, Face Recognition

Regulatory

Data status

Final

Samsung SM-F721W Galaxy Z Flip 4 5G TD-LTE CA 256GB (Samsung B4)

View Specs

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