Samsung Galaxy Z Flip4 vs Samsung Galaxy Z Flip3: SAR comparison
The Samsung Galaxy Z Flip4 lists the lower head sar, cellular only (us): 0.19 W/kg vs 1.05 W/kg for the Samsung Galaxy Z Flip3 (82% lower). Reported SAR values in W/kg; lower is shaded green and higher red within each row, for comparison only.
Side-by-side SAR values
| Measurement | Samsung Galaxy Z Flip4 | Samsung Galaxy Z Flip3 |
|---|---|---|
| Head SAR, cellular only (US) | 0.19 W/kg | 1.05 W/kg |
| Body SAR, cellular only (US) | 0.77 W/kg | 1.08 W/kg |
| Head SAR, Wi-Fi + cellular (US) | 1.56 W/kg | 1.59 W/kg |
| Body SAR, Wi-Fi + cellular (US) | 1.16 W/kg | 1.48 W/kg |
| Hotspot SAR, cellular only (US) | 1.01 W/kg | 1.21 W/kg |
| Hotspot SAR, Wi-Fi + cellular (US) | 1.59 W/kg | 1.59 W/kg |
| Head SAR (EU, 10 g) | 1.15 W/kg | 0.86 W/kg |
| Body SAR (EU, 10 g) | 1.20 W/kg | 1.58 W/kg |
| Display: Type | Foldable Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (peak) | Foldable Dynamic AMOLED 2X, 120Hz, HDR10+, 1200 nits (peak) |
| Display: Size | 6.7 inches, 101.5 cm2 (~85.4% screen-to-body ratio) | 6.7 inches, 101.5 cm2 (~84.7% screen-to-body ratio) |
| Display: Resolution | 1080 x 2640 pixels (~426 ppi density) | 1080 x 2640 pixels (~426 ppi density) |
| Display: Features | N/A | N/A |
| Hardware: Operating System | Android 12, upgradable to Android 13, One UI 5 | Android 11, upgradable to Android 13, One UI 5 |
| Hardware: Chipset | Qualcomm SM8475 Snapdragon 8+ Gen 1 (4 nm) | Qualcomm SM8350 Snapdragon 888 5G (5 nm) |
| Hardware: CPU | Octa-core (1x3.19 GHz Cortex-X2 & 3x2.75 GHz Cortex-A710 & 4x1.80 GHz Cortex-A510) | Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) |
| Hardware: GPU | Adreno 730 | Adreno 660 |
| Battery: Type | Li-Po 3700 mAh, non-removable | Li-Po 3300 mAh, non-removable |
| Battery: Charging | 25W wired, 50% in 30 min (advertised) 15W wireless 4.5W reverse wireless | 15W wired 10W wireless 4.5W reverse wireless |
| Battery: Battery Test | — | Endurance rating 69h |
| Design: Type | Bar | Bar |
| Design: Dimensions | Unfolded: 165.2 x 71.9 x 6.9 mm Folded: 84.9 x 71.9 x 15.9-17.1 mm | Unfolded: 166 x 72.2 x 6.9 mm Folded: 86.4 x 72.2 x 15.9-17.1 mm |
| Design: Weight | 187 g (6.60 oz) | 183 g (6.46 oz) |
| Design: Colors | Bora Purple, Graphite, Pink Gold, Blue, Yellow, White, Navy, Khaki, Red | Phantom Black, Green, Lavender, Cream, White, Pink, Gray, Thom Browne Edition, Bespoke Edition, Wooyoungmi Edition, Dream White |
Colors make differences within the same measurement easy to see. They do not label a phone safe or unsafe. US values use 1 g of tissue and the 1.6 W/kg limit; EU values use 10 g and 2 W/kg, so don't mix them. What SAR tells you.
Questions and answers
Which has lower head SAR, the Samsung Galaxy Z Flip4 or the Samsung Galaxy Z Flip3?
The Samsung Galaxy Z Flip4 lists the lower head sar, cellular only (us): 0.19 W/kg vs 1.05 W/kg for the Samsung Galaxy Z Flip3 (82% lower). Values are reported maximums from FCC filings as listed in the RF Safe dataset, in W/kg averaged over 1 gram of tissue.
Which has lower body SAR, the Samsung Galaxy Z Flip4 or the Samsung Galaxy Z Flip3?
The Samsung Galaxy Z Flip4 lists the lower body sar, cellular only (us): 0.77 W/kg vs 1.08 W/kg for the Samsung Galaxy Z Flip3 (29% lower). Values are reported maximums from FCC filings as listed in the RF Safe dataset, in W/kg averaged over 1 gram of tissue.
Which has lower hotspot SAR (Wi-Fi + cellular), the Samsung Galaxy Z Flip4 or the Samsung Galaxy Z Flip3?
Both list the same hotspot sar, wi-fi + cellular (us): 1.59 W/kg. Values are reported maximums from FCC filings as listed in the RF Safe dataset, in W/kg averaged over 1 gram of tissue.
What is the highest reported SAR value for each phone?
Across the six US measurements, the Samsung Galaxy Z Flip4's highest listed value is 1.59 W/kg and the Samsung Galaxy Z Flip3's is 1.59 W/kg. The FCC limit for the head and body is 1.6 W/kg averaged over 1 gram. Wi-Fi + cellular values are simultaneous-transmission sums and are evaluated differently, so read each row on its own.
Does a lower SAR mean a phone is safer?
No. SAR is a lab compliance measurement taken at maximum power. Everyday exposure depends on signal strength, distance from the body and which radios are active. Use SAR to compare phones, not as a health score.
Where do these numbers come from?
From the RF Safe SAR dataset, compiled from FCC equipment authorization filings (FCC ID A3LSMF721U and A3LSMF711U). Nothing on this page is estimated.