The StingRay Is Exactly Why the 4th Amendment Was Written.

Police have the power to collect your location along with the numbers of your incoming and outgoing calls and intercept the content of call and text communication. They can do all of this without you ever knowing about it.

How? They use a shoebox-sized device called a StingRay. This device (also called an IMSI catcher) mimics cell phone towers, prompting all the phones in the area to connect to it even if the phones aren't in use.