In short, this is a conductive box with a copper bag into which you can place your smartphone. Now instead of leaving your phone behind when you need to be off the grid, you can put it in here and still have it with you in case of emergency.
I’m very impressed by the simplicity of design and its effectiveness. It fits all but the very largest smartphones (even the iPhone and Huawei P9/10 Plus series fit!) and all tests confirm the device is properly isolated once inside the bag & box.
Even turning off your phone isn’t sufficient, it’s still being tracked by the service provider as tracking doesn’t require the operating system to be loaded. The only way to be off the grid is to leave your phone behind or pull the battery, but often that’s not an option and if you’re in an emergency you’re going to want it with you – now you can have the best of both worlds.
Available directly at the URL above, via Amazon, etc.