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Samsung Galaxy Z Flip4 Radiation Levels

Body SAR
Body SAR
0.77 W/kg is Ranked #15 at 48.13% of Legal Limit
More Info:
Radiation LevelsHEAD (1g)BODY (1g)HOTSPOT (1g)
Cellular Only0.19 W/kg0.77 W/kg1.01 W/kg
Simultaneous1.56 W/kg1.16 W/kg1.59 W/kg








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.










Samsung Galaxy Z Flip4 Safety Tip: Turning Off Wi-Fi and Bluetooth Reduces 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 these 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
RADIATION LEVELSCELLULAR ONLY(% DIFF)SIMULTANEOUS
HEAD0.19 W/kg87.8%1.56 W/kg
BODY0.77 W/kg33.6%1.16 W/kg
HOTSPOT1.01 W/kg57.4%1.59 W/kg

Avoid Excessive galaxy-z-flip4 Cell Phone Radiation!

To minimize the potential health risks associated with cell phone radiation, it’s important to reduce exposure as much as possible. This can be achieved by using hands-free devices and keeping the phone away from the body, as well as by using a phone case with built-in radiation shielding technology.

The best example is the RF Safe® galaxy-z-flip4 QuantaCase™ RFS1. This case is designed to deflect the strongest line-of-sight radiation away from the body while not obstructing the phone’s antenna. RF shielding technology reduces excessive radiation exposure across a wide range of radio frequencies, including 5G, Wi-Fi, and cellular. Additionally, the case features an integrated single-slot RFID-blocking wallet for added security.

The QuantaCase RFS1 provides RFID and anti-radiation protection without any conductive or signal-impeding components in the back of the case, allowing the phone to operate at its lowest possible output level and reducing the amount of harmful radiation emitted. The case also protects the phone from scratches, cracks, and dings.

To use the RF Safe® galaxy-z-flip4 QuantaCase™ RFS1 effectively, it’s recommended to always close the front flip cover and use the speakerphone when privacy is not an issue. When storing in a pocket, face the front flap towards the body to deflect the strongest line-of-sight radiation. When texting, fold the flap behind the phone to shield the back while held in hand.

It’s important to keep in mind that maintaining a distance from the phone is the best way to reduce EMF exposure. However, using a phone case with built-in radiation shielding technology like the RF Safe® galaxy-z-flip4 QuantaCase™ RFS1 can provide an extra layer of protection in an ultra-thin design.

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.

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!
  • 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
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)

Samsung Galaxy Z Flip4 - QuantaCase™





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