INTERACTIVE LESSON 02
Phone case or Faraday pouch?
Two different purposes. Explore the designs, ask better questions and check what the evidence tells you.
STEP 1 OF 4
What do you want to do with your phone?
Start with the job, not the product label. Choose a purpose to explore.
A case and an enclosure have different jobs
Case used with a phone
A case may leave parts of the phone exposed. Ask what is shielded, in which position, and what the test establishes during actual use.
Signal-isolation pouch
Open: the phone is not fully enclosed in this illustration.
What would convince you?
A headline percentage is not the whole test. Open each question before comparing products.
Was the exact finished product tested?
Identify the model, phone or test source, and configuration. A fabric sample is not the same test object as a finished pouch or case.
Which signals and conditions were tested?
Look for the frequency range, orientation, closure, method and limitations. One failed call does not verify every wireless service.
Does the evidence match the claim?
A signal-attenuation result is not itself proof of a health benefit. The FTC cautions about partial phone shields and possible interference with phone operation. Check the exact claim rather than assuming every accessory performs alike.
Can I use it as intended?
Check fit, closure instructions, charging access and return terms. A pouch intended to isolate wireless connections conflicts with receiving calls while it is effectively isolating those connections.
Quick check
Lesson complete
Match the product to the purpose, then check the evidence for the exact claim.
Read the lesson summary without the interaction
Choose your purpose first: using a connected phone and isolating wireless connections are different jobs. A case and a closed pouch should not be assumed to perform alike.
A pouch must be used in its tested configuration; closure alone is not proof of performance. Ask for finished-product evidence covering the relevant signals, method and limitations. One failed call does not establish blocking across every service.
Check compatibility, fit and operating instructions. Keep measured shielding claims separate from health claims. A demonstration is a starting point for questions, not a universal certification.
Sources and scope
- FTC: cellphone radiation shield guidance (2011) — consumer guidance, not a test of every current product.
- NIST SP 800-101 Rev. 1 (2014) — mobile-device forensics and radio-isolation context, not evidence of health protection.