[MayankGoyal]

But if you take your phone out of the packet, your location will be "broadcasted" to the network. That is, everytime you want to make or receive a call, or do anything with your phone, the network will know your location.

Flight mode would provide the same level of protection as this and at a much cheaper price.

[MayankGoyal]

Unrelated to the product: Is it possible to throw the tracking off by blocking some cellular towers and only connect to one? Then they have a radius you are in, but not the exact location.