The Galaxy S25 lineup (S25, S25 Plus, and S25 Ultra) promises top‐tier features—from ultra‐sharp displays to cutting‐edge cameras—while also adhering to safe RF exposure limits set by regulators like the FCC. Below is a detailed roundup of each model’s reported SAR (Specific Absorption Rate) values, along with quick highlights on their key hardware and features.
Samsung Galaxy S25
Radiation Overview
- Head (Cellular Only): 1.12 W/kg
- Body (Cellular Only): 0.73 W/kg
- Hotspot (Cellular Only): 1.14 W/kg
- Simultaneous (Cellular + Wi‐Fi):
- Head: 1.35 W/kg
- Body: 1.39 W/kg
- Hotspot: 1.39 W/kg
Rank & Percentage
- Ranked #41 among comparison devices, at ~70% of the 1.6 W/kg FCC limit for head SAR.
Quick Specs (Rumored / Typical Samsung S-series)
- Display: ~6.1–6.2 inch Dynamic AMOLED, 120 Hz refresh.
- Camera: Triple‐lens setup with a high‐resolution main sensor (likely 50–108 MP).
- Battery: ~3,800–4,000 mAh with fast charging.
- Hardware: Likely Qualcomm Snapdragon or Exynos chip (region‐dependent), 8 GB RAM.
- Connectivity: 5G (Sub‐6 & mmWave), Wi‐Fi 6E or 7, Bluetooth 5.x, NFC.
- Design: Slim bezel, improved in‐display fingerprint scanner.
- Network: GSM / CDMA / HSPA / EVDO / LTE / 5G support.
S25 Radiation Takeaway
Turning off Wi‐Fi and Bluetooth can reduce RF exposure by approximately:
- 17% at the head
- 47.5% at the body
- 21.9% in hotspot mode
Samsung Galaxy S25 Plus
Radiation Overview
- Head (Cellular Only): 1.20 W/kg
- Body (Cellular Only): 0.83 W/kg
- Hotspot (Cellular Only): 1.19 W/kg
- Simultaneous (Cellular + Wi‐Fi):
- Head: 1.59 W/kg
- Body: 1.58 W/kg
- Hotspot: 1.59 W/kg
Rank & Percentage
- Ranked #49, at ~75% of the 1.6 W/kg FCC limit for head SAR (in cellular‐only mode).
Quick Specs (Rumored / Typical Samsung S-series “Plus”)
- Display: ~6.6–6.7 inch Dynamic AMOLED, 120 Hz refresh.
- Camera: Enhanced triple‐camera or quad‐camera array.
- Battery: ~4,500–4,700 mAh.
- Hardware: Similar chipset to S25 but more RAM/storage options (e.g., 8–12 GB RAM).
- Connectivity: Full suite of 5G, Wi‐Fi 6E/7, Bluetooth 5.x, NFC, etc.
- Design: Larger form factor, narrower bezels than the standard S25.
S25 Plus Radiation Takeaway
Disabling Wi‐Fi/Bluetooth significantly cuts down on exposure:
- 24.5% at the head
- 47.5% at the body
- 33.6% in hotspot mode
Samsung Galaxy S25 Ultra
Radiation Overview
- Head (Cellular Only): 1.26 W/kg
- Body (Cellular Only): 0.78 W/kg
- Hotspot (Cellular Only): 1.19 W/kg
- Simultaneous (Cellular + Wi‐Fi):
- Head: 1.59 W/kg
- Body: 1.40 W/kg
- Hotspot: 1.48 W/kg
Rank & Percentage
- Ranked #51, at ~62.5% of the 1.6 W/kg limit (head SAR).
Quick Specs (Rumored / Typical Samsung Ultra)
- Display: ~6.8+ inch Edge Dynamic AMOLED, 120–144 Hz adaptive refresh.
- Camera: Likely a quad‐camera array with a 200 MP main sensor, advanced periscope zoom.
- Battery: ~5,000 mAh with super‐fast charging.
- Hardware: Top‐tier Snapdragon/Exynos CPU, 12–16 GB RAM, up to 1 TB storage.
- Connectivity: 5G, Wi‐Fi 6E/7, Bluetooth 5.x, UWB, NFC.
- Design: Premium glass/metal build, integrated S Pen support (following the S Ultra tradition).
S25 Ultra Radiation Takeaway
Turning off Wi‐Fi and Bluetooth cuts:
- 20.8% at the head
- 44.3% at the body
- 24.4% in hotspot mode
Understanding SAR & Why It Matters
Specific Absorption Rate (SAR) measures how much radiofrequency (RF) energy your body absorbs from a device. In the U.S., the FCC mandates that phones must not exceed 1.6 W/kg (averaged over 1 g of tissue) for head or body use. All three S25 models stay below this limit in both cellular‐only and simultaneous (cellular + Wi‐Fi) modes.
Children vs. Adults
Kids may have higher SAR because their skulls are thinner and still developing. Many experts recommend limiting prolonged close contact for younger users.
Wi‐Fi Impact
As the numbers show, enabling both cellular + Wi‐Fi raises SAR levels versus using cellular alone. If you’re looking to minimize RF exposure, consider toggling off unused transmitters when possible.
Practical Tips for Reducing Exposure
- Turn Off Wi‐Fi/Bluetooth when not in use.
- Use Speakerphone or Headphones for calls, keeping the device away from your head.
- Avoid Carrying Phones Directly Against Your Body for long durations.
- Use RF‐Blocking Accessories such as QuantaCase or other well‐designed products that claim to mitigate direct RF exposure.
Feature Recap Across the S25 Line
| Model | Display | Cameras | Battery | Performance | Who It’s For |
|---|---|---|---|---|---|
| Galaxy S25 | ~6.1–6.2″ Dynamic AMOLED | High‐res main + ultrawide + tele | ~4,000 mAh | Snapdragon/Exynos + 8 GB RAM | Those wanting a top flagship in a compact, everyday‐friendly size. |
| Galaxy S25 Plus | ~6.6–6.7″ Dynamic AMOLED | Possibly triple or quad setup | ~4,500–4,700 mAh | Snapdragon/Exynos + up to 12 GB RAM | Users needing a bigger screen and battery without going “Ultra.” |
| Galaxy S25 Ultra | 6.8″+ edge Dynamic AMOLED | 200 MP main + advanced zoom system | ~5,000 mAh | High‐end Snapdragon/Exynos + up to 16 GB RAM | Power users, mobile photographers, S Pen enthusiasts. |
Final Thoughts
Samsung’s Galaxy S25 series blends top‐notch hardware with robust safety compliance. Even at their highest SAR readings (particularly the S25 Plus and S25 Ultra in simultaneous mode), these phones remain within the FCC’s 1.6 W/kg limit. By taking simple steps—like disabling unused wireless transmitters or using EMF‐blocking accessories—you can reduce your personal exposure further.
Whether you choose the S25, S25 Plus, or S25 Ultra, you’ll get:
- A stunning display with high refresh rates
- Versatile cameras for photography and video
- All‐day batteries (and fast charging)
- Flagship performance on the latest Android platform
And best of all, you can use these devices confidently knowing they pass strict regulatory guidelines for RF emissions.
Additional Resources
- FCC Guidelines on SAR Limits
- Samsung’s Official Website (for future device confirmations)
- RF Safe® QuantaCase (for EMF‐blocking accessories)