I work for a company that has decided that they want to move forward with a device that will emit a frequency that allows them to track individual cell phones which they plan to use to target people with ads.
This is a hotel that will know where all their guests are at all times and will use it to tell them what to do.
I work for a company that has decided that they want to move forward with a device that will emit a frequency that allows them to track individual cell phones which they plan to use to target people with ads.
This is a hotel that will know where all their guests are at all times and will use it to tell them what to do.
No need for special equipment, when it is possible using wifi see this article for example.