Review on 🔒 Secure Signal Isolation Bag: Faraday Bag for Phones, Tablets & Key Fobs - Fireproof Shield Pouch Protects from Hacking, Tracking, NFC, WiFi/Bluetooth (9.8"X11", Black) by Robby Fingaw

I bought this after realizing that all the annoying phone calls stopped after I disabled Facebook and its companion apps (on my phone, Facebook is a system app and can't be easily deleted if there is no root ). Then I read that the phone can still be used to track you as a risk was taken by a person who values their security and privacy, and it didn't disappoint - it worked. This is highly recommended if you are traveling or have to leave your phone in the car at work due to safety regulations.