Do EMF phone cases actually work?
What a shielding case must accomplish without forcing the phone to transmit harder.
Read the guide →We buy products at retail, measure the same source with and without them, and publish the before-and-after numbers — including the failures and products that make readings worse. No sponsored verdicts.
We are buying products at retail and testing them one at a time. Get the first verdict by email, or tell us which product should go on the bench next.
Before-and-after measurements from products we purchased and tested independently.
| Product | Claim on the box | Verdict | Measured change | Price |
|---|
Understand what measurements mean, which claims are physically possible, and which simple changes may beat an expensive product.
What a shielding case must accomplish without forcing the phone to transmit harder.
Read the guide →A measurement-based look at shielding products, stickers, pendants, and common claims.
Read the guide →Why a few extra feet can matter more than many products marketed as protection.
Read the guide →The source, meter, distance and operating mode stay fixed. The product is the only variable.
Send us the product name, its claim and where it is sold. We buy selected products at retail and publish the result either way.