[logic101010]

Your DMV example is not quite the same as what is being done. If it was, it would quite probably be reasonable in the circumstances.

The dragnet is every device, not just those matching a partial description of a suspect. For it to compare with your car example, the police would need to have a description of a suspect using an Android Galaxy S4 (or whatever) and then ask only for Galaxy S4 devices in the area.

[pmorici]

They do have a description based off the security cameras of a suspect using a phone at a location at a very narrow time. Go read the warrant it says within 150 Meters of the spot the crime took place in a narrow one hour period.