The RF Safe buying guide · Since 1998
The truth about
anti-radiation
phone cases.
A case changes the space around a working antenna. Learn why connection quality, materials and everyday use matter more than a shielding percentage.
Published by RF Safe / QuantaCase · We sell phone cases
Apple · Samsung · Google Pixel · Motorola
Choose a model to open its exact QuantaCase product page.
Look past the promise.
The physics first
Your phone is an active radio.
Its case becomes part of the picture.
Your phone and network continually manage the radio link. When connection conditions change, the phone may adjust its transmit power. Materials placed near its antennas can also change their behavior.
There are two distinct questions: how much power is transmitted, and where the RF energy goes. A case can redistribute nearby fields and local absorption without an increase in total transmit power. The effect depends on the full setup. [7]
SAR, or specific absorption rate, measures the rate RF energy is absorbed by body tissue under specified test conditions. It is not interchangeable with a material’s shielding percentage. [7]
Two mechanisms.
Different questions to test.
A conceptual guide to the physics, not a measured radiation pattern or a prediction for a particular case.
Path 01 / Connection & power control
Ask how the complete phone-and-case setup performs across bands and reception conditions. Poor reception is a reason to favor distance and shorter calls.
Path 02 / Fields & local absorption
Ask for local exposure measurements in specified positions. A lower reading at one point does not establish lower exposure everywhere.
Uncertainty merits caution, not a made-up verdict. A shielding swatch test cannot settle either pathway for a finished case. An untested configuration is an unanswered question, not proof of harm. Apply these questions to QuantaCase as well. [2] [7]
Know what to question
Six EMF phone-case red flags.
Red flags are prompts for better questions. They are not proof that a particular case raises exposure, or that another case prevents harm.
A big percentage. A small explanation.
“Blocks 99%” is incomplete without knowing what was measured, at which frequencies, and in what setup.
What to ask
Was the test on a sheet of shielding material, or the finished case with a working phone? A material result is not a percentage reduction in your total exposure. It is not evidence of a health benefit. [4]
Metal hardware. Missing phone-specific data.
A metal plate, magnetic mount or strap loop deserves a closer look, not an automatic verdict.
Why the details matter
Apple’s September 2026 accessory guidelines identify metal, conductive materials and magnets as potential antenna-performance concerns, especially near antenna areas. Placement and phone model matter. Ask for tests across bands, with the accessory open, closed and configured as used. A photo cannot establish a change in transmit power or SAR. [2]
A shielded flap. Unclear orientation.
Directional shielding only has its intended role when the relevant panel is between you and the phone.
Check real-life use
Ask which panel contains the shield, how the case must be held, and what happens when it is open, folded back or detached. Check whether openings are shielded. An aperture alone cannot tell you the resulting exposure. [4]
A wallet full of variables.
Cards, wallet thickness and removable parts change the assembled product. Are those conditions in the test?
What a fair comparison needs
Do not assume a thicker wallet or magnetic detachable shell causes higher exposure. Ask whether testing includes the sold configuration and intended use. For a detachable design, identify which component contains the shielding and which configurations were evaluated. [2]
“Lab tested.” No report to inspect.
A logo or meter demonstration tells you less than the methods, test conditions and full results.
Look beyond the badge
Look for the lab, date, phone model, bands, separation distance, shield orientation and a no-case comparison. Ask whether the measurements include the phone’s response to the network. A nearby field reading is not the same quantity as SAR. [3]
A promise that replaces good habits.
No case should be a reason to hold your phone closer or spend longer on a call.
Start with what you can control
Start with speakerphone or a headset, shorter calls and a strong signal. A case is not a health guarantee, and its materials cannot establish a personal health outcome. Apply that standard to QuantaCase, too. [1]
The same checklist applies to every brand, including ours. A magnet, metal component, thick wallet or cutout cannot be assigned an RF effect from a product photo alone.
Ready to see a case for your phone?
Choose your brand and model, then review the exact product and its instructions.
Before you buy
Ask for the test.
Then ask what it actually tested.
Which product?
The exact phone and finished case, or only a sample of shielding material? Which cards, mounts and accessories were included?
Which conditions?
Which frequencies and radios? What distance, orientation, signal environment and open-or-closed configuration?
What was held constant?
A no-case baseline with matching output, position and separation? Then a separate check of adaptive power under defined reception conditions?
Which question was answered?
Material attenuation, assembled antenna performance, local SAR, or network-controlled power? These are different measurements. None alone establishes a health benefit.
Be careful with recycled statistics. EWG’s often-quoted 2015 “20–70%” discussion concerned older iPhone 4 testing with three nonmetal cases, supplied by case-maker Pong. It is not a finding about every case, every magnet, or today’s phones. [3]
Your habits come first
The best first step
doesn’t require a new case.
Put distance to work.
Use speakerphone or a headset with the handset away from your body when practical. Set the phone on a surface rather than against you. [1]
Keep calls brief. Favor a good signal.
Keep calls shorter when practical and favor a strong signal; phones may use more power when reception is weak. [1]
Use a directional folio as intended.
At your ear, follow its instructions: the shielded flap belongs between you and the phone. A front flap is not an enclosure, and orientation alone does not prove a particular reduction. [4]
Keep perspective.
A case is an accessory, not a health guarantee. Do not use a shielding claim as a reason to hold a phone closer or abandon distance habits.
Where QuantaCase fits
A practical folio.
An honest starting point.
RF Safe was founded in 1998. QuantaCase is its directional-shielding folio. Its front flap is designed to sit between you and your phone, alongside practical distance habits. It does not shield every direction.
- One card slot and a built-in stand. Everyday functions that keep the folio useful and make hands-free use easier.
- Shielding in the front flap. Position and use matter. Review the instructions for the model you buy.
- No shortcut around the evidence. Material tests do not establish equivalent real-world exposure reduction or a health benefit. This guide does not demonstrate a measured reduction for every phone-and-case combination.
Fit, colors and availability depend on your model.
More than a case
Why QuantaCase?
Why choose a case without grand health promises? We think of QuantaCase as a TruthCase: a practical directional-shielding folio paired with clear guidance on distance, positioning and everyday phone use. For us, risk mitigation starts with education, awareness and informed habits.
RF Safe’s mission reaches beyond the case. We advocate replacing indoor RF data links with Li-Fi and other light-based communication wherever compatible infrastructure allows, in schools, homes and businesses. This is our vision for “biologically aligned” connectivity. It requires compatible devices and infrastructure; the case itself does not provide a Li-Fi connection.
The name draws on quanta, the plural of quantum: discrete amounts of energy. Our “case for controlling quanta” is a brand philosophy about making more thoughtful technology choices and being mindful of the energy around us.
Read beyond the headline
Sources. Context. Limits.
Guide reviewed October 4, 2026
Evidence and product claims are distinguished below.
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1 / Government consumer guidance · 2011FTC: avoiding cell-phone radiation scams ↗
Discusses possible signal interference from partial shields and practical advice on distance, call length and reception. Historical consumer guidance; it does not test the phone-and-case combinations shown here.
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2 / Device-manufacturer engineering guidance · September 2026Apple: Accessory Design Guidelines, R31 ↗
Pages 28–29, sections 4.9.1–4.9.3 discuss antenna performance, conductive materials, magnets, placement and accessory-on/off testing. Current design guidance, not a SAR finding for a particular case or proof that every metal component increases exposure.
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3 / Advocacy report · 2015 · Historical test contextEWG: does your case raise radiation exposure? ↗
The 20–70% figure concerns three nonmetal cases on an iPhone 4, body-worn SAR at 10 mm, based on 2012 testing supplied by competing case-maker Pong. It does not establish performance of modern cases or real-world health outcomes.
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4 / Our product explanation · Commercial sourceQuantaCase: how it is intended to work ↗
Describes front-flap shielding and intended use. Product design statements are not independent efficacy findings. The page distinguishes shielding-material tests from exposure reduction and health benefits.
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5 / Reception and modeled dose · September 2026Beláčková et al.: reception quality and brain dose ↗
In a five-minute daily 4G-call scenario, the final abstract estimates about 150 versus 4 mJ/kg/day at RSRP −120 versus −60 dBm. Reception conditions informed modeled brain dose. The study did not test phone cases or health outcomes; its 24-hour comparison concerns environmental RF exposure.
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6 / Government record · 2013FCC 13-39, paragraph 233 ↗
Notes that some aftermarket patches and shields may have no effect or change exposure unpredictably, including increases under certain conditions. A historical basis for careful evaluation, not a universal finding about today’s cases.
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7 / International technical guidance · May 2018ITU-T K Supplement 13: RF-EMF exposure ↗
Sections 7.1–7.3 distinguish antenna behavior, network power control, geometry, materials, position and orientation. SAR tracks power proportionally only when other relevant conditions remain unchanged. Supports the two-path explanation above.
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8 / Brand history · First-party accountRF Safe: company history ↗
States that RF Safe was founded in 1998. Longevity is background about the publisher, not evidence of product performance.
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Our disclosurePublished by RF Safe / QuantaCase
We sell phone cases and have a commercial interest in this subject. We link sources so you can inspect the reasoning. Government guidance cited here does not certify or endorse our products. No medical or disease-prevention claim is made.
A few questions worth settling.
Does “anti-radiation” mean a case makes my phone safe?
No. It is a marketing category, not a safety certification. Ask what claim is supported by the actual test. A material attenuation result does not establish a health benefit or make normal usage conditions irrelevant.
Does one test cover every way I use a case?
Not automatically. A phone-and-case SAR report is evidence for its stated model, bands, separation and orientation. Read the methods to see whether they match your product and intended use. A material-only test answers a different question.
Can every metal component be called a design flaw?
No. Metal parts can affect RF behavior, but a specific outcome depends on the component, location, phone and test conditions. Metal components can alter antenna tuning and nearby RF patterns. Without testing the complete phone-and-case combination, their effect on transmit power and exposure remains uncertain.
What if I cannot find my phone?
Choose the exact model listed in your phone’s settings. Similar names do not mean the same fit. The picker shows the catalog checked October 4, 2026; sold-out models are disabled. Product-page availability is the final check.
Start with better questions.
Find the right fit.
Check your exact phone model, review the case details, and keep distance habits part of the plan.
Find your phone model
