Review on Silver Faraday Bag (2 Pack) – RFID Signal Blocking Pouch for Cell Phone Privacy, Car Key FOB Protection – Anti-Tracking, Anti-Spying Wallet Case by Russ Mashlan

This is a solid construction and it worked right from the start. I say first because when tested on my phone it worked perfectly, blocking all transfers and calls in and out. However, recently (about 3-4 months after purchase) I praised how well it works and recommended it to my relatives, but when I went to test it, my phone was unlocked. It would block my relatives phone if inside but not mine. I'm not sure if our devices somehow recognize and bypass this technology, but for only 3-4 months of usage (maybe even less if I realize it's gone), it's not worth buying.