Silent Pocket sells wallets with RFID blocking and separate Faraday sleeves for phones, key fobs, and laptops. A closed sleeve is meant to attenuate radio so the device inside is not on the cellular, Wi-Fi, or Bluetooth network. That is a real use: a phone you want silent in a meeting, a fob you do not want relay-attacked in a coat pocket.
The sleeve works while it is fully closed and the device is actually inside it. A phone in your hand is not protected by the sleeve in the bag. Seams wear. Cheap unbranded bags often fail a simple test where the phone still rings. Silent Pocket publishes more test talk than most wallet brands. It still costs more than a nylon pouch, and it does not encrypt anything or stop a camera.
Use a sleeve when the device must be off the air. Test it: call the phone. silent-pocket.com
Test a Silent Pocket sleeve the day it arrives. Put the phone inside, close it, and call it. If it rings, the sleeve is wrong, damaged, or not closed. Key-fob sleeves are the underrated one, because relay theft of cars is a radio trick, not an RFID wallet trick. A sleeve in the bag while the phone is in your hand does nothing. None of this encrypts the phone. Lock the screen too.
