Samsung Galaxy Z Flip4 * RF SAFE® Radio Frequency Safe

Samsung Galaxy Z Flip4 Radiation Levels

Head SAR (Cellular Only)

Radiation Levels	Head	Body	Hot Spot
Cellular Only	0.19 W/kg	0.77 W/kg	1.01 W/kg
Wi-Fi + Cellular	1.56 W/kg	1.16 W/kg	1.59 W/kg

Add to Compare Compare

Samsung Galaxy Z Flip4 SAR Level Summary:

The cellular transmission SAR values for the Samsung Galaxy Z Flip4 (FCC ID A3LSMF721U) are 0.19 W/kg (watts per kilogram) at the head and 0.77 W/kg when worn on the body. The hotspot/Airplay SAR level is 1.01 W/kg. The simultaneous transmission SAR values for Galaxy Z Flip4 (cellular plus Wi-Fi) is 1.56 W/kg at the head, 1.16 W/kg when worn on the body, and 1.59 W/kg when used as a hotspot simultaneously with other transmitters active.

Select a phone to compare SAR levels to other popular phones

Cell Phone Usage & Radiation Exposure

Samsung Galaxy Z Flip4 Safety Tip:

How Much Will Turning Off Wi-Fi and Bluetooth Reduce Radiation?

This SAR chart reveals how turning off Wi-Fi and Bluetooth on your Samsung Galaxy Z Flip4 can significantly reduce your exposure to radiation. Our SAR comparison chart shows that by simply turning off Wi-Fi and Bluetooth transmitters, you can lower the RF radiation exposure to your head by 87.8%, and you can lower exposure to the body by 33.6%, when considering these differences between cellular-only (Wi-Fi/Bluetooth OFF) and simultaneous use exposure (Wi-Fi/Bluetooth ON), a wise way to reduce excessive phone radiation is to tap off unnecessary transmitters when not in use! Additionally, when using your phone as a hotspot, turning off Bluetooth can reduce your exposure by up to 57.4% according to the FCC SAR report for device number A3LSMF721U.

Samsung Galaxy Z Flip4 SAR Levels

Comparison of SAR levels between cellular-only and simultaneous exposure
Cellular Only	(% DIFF)	Wi-Fi + Cellular
0.19 W/kg	HEAD 87.8%	1.56 W/kg
0.77 W/kg	BODY 33.6%	1.16 W/kg
1.01 W/kg	HOTSPOT 57.4%	1.59 W/kg

Key Takeaways

Children vs Adults: Children have higher SAR levels due to thinner skulls and developing tissues, making them more vulnerable to radiation.
Wi-Fi Impact: Simultaneous use of cellular and Wi-Fi transmission increases SAR levels for all age groups.
Precautionary Measures: Using radiation protection products like QuantaCase can help mitigate these risks, especially for younger users.

By understanding these differences, parents and guardians can make informed decisions to better protect their children from excessive microwave radiation exposure, emphasizing the need for safer smartphone usage practices and protective accessories like QuantaCase.

Children vs Adults Radiation Exposure

The Specific Absorption Rate (SAR) of a mobile device measures the amount of radio frequency energy absorbed by the body during device usage.

The SAR values for the galaxy-z-flip4 (FCC ID A3LSMF721U) are as follows:

0.19 W/kg when held at the head with cellular transmission only
0.77 W/kg when worn on the body with cellular transmission only
1.01 W/kg when used as a Hotspot or Airplay
1.56 W/kg when held at the head with simultaneous cellular and Wi-Fi transmission
1.16 W/kg when worn on the body with simultaneous cellular and Wi-Fi transmission
1.59 when used as a Hotspot simultaneously with other transmitters active.

SAR Levels
Overview
QuantaCase™
FCC SAR Report Image

Samsung Galaxy Z Flip4 - SAR Levels

FCC SAR Levels

FCC Approval Date This is the date the phone SAR test was completed before the phone's release to the public as required by law.
28 August 2022
FCC ID The FCC ID is the code used to register a device for FCC compliance
A3LSMF721U
FCC Report Link A direct link to the FCC's website for confirming SAR levels that are listed on our website - We did the homework for you!
FCC Specific Absorption Rate (SAR) Report For Manufacturer Submitted Model
US SAR Ratings USA Legal Limit is 1.6 W/kg
USA Legal Limit is 1.6 W/kg - FCC SAR testing is measured in watts per kilogram (or W/kg) averaged over ONE gram of simulated biological tissue.
Head SAR Level SAR test when held against your head when only using cellular service. Wifi and other transmitter are NOT active
0.19 W/kg
Body SAR Level SAR test when held against your body only using cellular service. Wifi and other transmitter are NOT active
0.77 W/kg
Product Specific Use SAR test when held against your body only using the phone as a hotspot. Cellular and other transmitter are NOT active
1.01 W/kg
Simultaneous Transmission The highest possible SAR recorded with ALL transmitters active, Cellular, WiFi, and Hotspot
1.59 W/kg
Simultaneous Head The highest possible SAR test when held against your HEAD with cellular and WiFi transmitters active,
1.56 W/kg
Simultaneous Body The highest possible SAR test when held against your BODY with cellular and WiFi transmitters active,
1.16 W/kg
Hotspot SAR The highest possible SAR test when held against your BODY using the phone as a hotspot with cellular and WiFi transmitters active,
1.59 W/kg

EU SAR Level

EU SAR Ratings
EU Legal Limit is 2.0 W/kg
Head SAR Level
1.15 W/kg (head)
Body SAR Level
1.20 W/kg (body)

Network	Technology	GSM / CDMA / HSPA / EVDO / LTE / 5G
	2G bands	GSM 850 / 900 / 1800 / 1900
		CDMA 800 / 1900
	3G bands	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
		HSDPA 850 / 900 / 1900 / 2100
		CDMA2000 1xEV-DO
	4G bands	LTE
	5G bands	SA/NSA/Sub6/mmWave
	Speed	HSPA, LTE-A (6CA), 5G

Launch	Announced	2022, August 10
Launch	Status	Available. Released 2022, August 25

Body	Dimensions	Unfolded: 165.2 x 71.9 x 6.9 mm Folded: 84.9 x 71.9 x 15.9-17.1 mm
	Weight	187 g (6.60 oz)
	Build	Plastic front (opened), glass back (Gorilla Glass Victus+), aluminum frame
	SIM	Nano-SIM and eSIM
		IPX8 water resistant (up to 1.5m for 30 mins) Armor aluminum frame with tougher drop and scratch resistance (advertised)

Display	Type	Foldable Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (peak)
	Size	6.7 inches, 101.5 cm² (~85.4% screen-to-body ratio)
	Resolution	1080 x 2640 pixels (~426 ppi density)
		Cover display: Super AMOLED, 1.9 inches, 260 x 512 pixels (Gorilla Glass Victus+)

Platform	OS	Android 12, upgradable to Android 13, One UI 5
	Chipset	Qualcomm SM8475 Snapdragon 8+ Gen 1 (4 nm)
	CPU	Octa-core (1×3.19 GHz Cortex-X2 & 3×2.75 GHz Cortex-A710 & 4×1.80 GHz Cortex-A510)
	GPU	Adreno 730

Memory	Card slot	No
	Internal	128GB 8GB RAM, 256GB 8GB RAM, 512GB 8GB RAM
		UFS 3.1

Main Camera	Dual	12 MP, f/1.8, 24mm (wide), 1/1.76″, 1.8m, Dual Pixel PDAF, OIS 12 MP, f/2.2, 123 (ultrawide), 1.12m
	Features	LED flash, HDR, panorama
	Video	4K@30/60fps, 1080p@60/240fps, 720p@960fps, HDR10+

Selfie camera	Single	10 MP, f/2.4, 26mm (wide), 1.22m
	Features	HDR
	Video	4K@30fps

Sound	Loudspeaker	Yes, with stereo speakers
	3.5mm jack	No
		32-bit/384kHz audio Tuned by AKG

Comms	WLAN	Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
	Bluetooth	5.2, A2DP, LE
	Positioning	GPS, GLONASS, GALILEO, BDS
	NFC	Yes
	Radio	No
	USB	USB Type-C 2.0, USB On-The-Go

Features	Sensors	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
		Samsung Pay (Visa, MasterCard certified)

Battery	Type	Li-Po 3700 mAh, non-removable
	Charging	25W wired, 50% in 30 min (advertised) 15W wireless 4.5W reverse wireless

Misc	Colors	Bora Purple, Graphite, Pink Gold, Blue, Yellow, White, Navy, Khaki, Red
	Models	SM-F721B, SM-F721B/DS, SM-F721N, SM-F721U, SM-F721U1, SM-F721W
	SAR	1.02 W/kg (head) 0.94 W/kg (body)
	SAR EU	1.15 W/kg (head) 1.20 W/kg (body)
	Price	C$ 1,100.00 / ₹ 71,850 / $ 564.00 / £ 799.99 / € 789.90

Tests	Performance	AnTuTu: 685754 (v8) \| 800001 (v9) GeekBench: 3913 (v5.1) GFXBench: 74fps (ES 3.1 onscreen)
	Display	Contrast ratio: Infinite (nominal)
	Camera	Photo / Video
	Loudspeaker	-27.5 LUFS (Good)

Select Your Phone Brand: Select Your Phone Model:

Need Support

Samsung Galaxy Z Flip4 Radiation Levels

Head SAR (Cellular Only)

Body SAR (Cellular Only)

Hotspot SAR (Cellular Only)

Head SAR (Simultaneous)

Body SAR (Simultaneous)

Hotspot (Simultaneous)

Samsung Galaxy Z Flip4 Safety Tip: