5G Dynamic AM-OLED Smartphone

Samsung SM-F721U Galaxy Z Flip 4 5G UW TD-LTE US 256GB / SM-F721T (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 T‑Mobile (SM‑F721T) edition of the US UW TD‑LTE model, shipping with 256 GB of internal storage. It identifies its Linux kernel as version 5.10.81, a detail not listed for the base model.

Compared with other US‑market Flip 4s, this unit is carrier‑locked to T‑Mobile, whereas the SM‑F721U1 models are unlocked or carrier‑agnostic, and the SM‑F721U/SM‑F721V and SM‑F721U/SM‑F721A variants tie to Verizon and AT&T respectively. It also differs from the international releases (JP, KR, CA, Global, CN/HK/TW) and the special‑edition models (BTS, Maison Margiela, Bespoke) which offer alternative storage sizes, regional LTE bands, or exclusive cosmetic collaborations.

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 · 3 bandsLTE · 18 bandsTD-LTE · 6 bandsUMTS · 5 bandsGSM · 4 bands

All NR bands (2)

NR 1700/2100 MHz (N66)
NR 600 MHz (N71)

All TD-NR bands (3)

TD-NR 2500 MHz (N41)
TD-NR 28 GHz (N261) bands
TD-NR 39 GHz (N260)

All LTE bands (18)

LTE 1700/2100 MHz (Band 4, AWS)
LTE 1700/2100 MHz (Band 66)
LTE 1800 MHz (Band 3)
LTE 1900 MHz (Band 2, PCS)
LTE 1900 MHz (Band 25)
LTE 2100 MHz (Band 1)
LTE 2600 MHz (Band 7)
LTE 600 MHz (Band 71)
LTE 700 MHz (Band 12)
LTE 700 MHz (Band 13)
LTE 700 MHz (Band 28)
LTE 700 MHz (Band XIV)
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 (6)

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 3600 MHz (Band 48)
TD-LTE 5900 MHz (Band XLVI)

All UMTS bands (5)

UMTS 1700/2100MHz (Band IV, AWS)
UMTS 1900MHz (Band II, PCS)
UMTS 2100MHz (Band I, IMT)
UMTS 850MHz (Band V, CLR)
UMTS 900MHz (Band VIII)

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

T-Mobile USA

Markets

North America (NA) (USA)

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

HAC

M3, T3

Data status

Final

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

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