Signal Blocking Bag for iPhone 8 - Cell Phone Privacy Protection Anti-tracking Anti-spying Anti radiation Key Pouch Signal Blocker Signal Shielding Wallet Case Handset Function Bag Protective Anti-Radiation Case for Phone. The Mobile Phone Signal Blocking Bag works with all networks and is extremely easy to use. Simply place your phone into the bag and all calls to you will not get through. When using this bag, your number appears as Unavailable or Network Busy for the person calling you. Note: Suitable for mobile phone under 5.8 inch screen