How to Evaluate a Phone Case’s Radiation Test Report

Three things to look for in the report

1. The item tested. A swatch of material is different from a completed case on a phone. Check that the model, orientation and parts covered match the product offered for sale.
2. The comparison. Look for measurements using the same setup with and without the case, across the relevant frequencies. A single percentage without a baseline is hard to interpret.
3. The limits. A material test does not establish how much exposure a person receives or whether there is a health benefit. Look for an original report with a date and named laboratory.

The FTC warns that interfering with the signal may cause a phone to draw more power. Read our guide to phone shields and alternatives for the practical buying decision.

References: FTC consumer guidance and FDA evidence overview.