[netsharc]

Someone mentioned geofence warrants, i.e. cops/feds asking "Hey Google, tell us which accounts had devices found in these time-space coordinates!", I guess they'd be asking mobile providers to do more logging as an alternative.

A Google account is probably more useful than a SIM card, which might be anonymous or have exchanged hands from the registered buyers, if you as a cop can ask Google to hand over the emails or IPs used by this account, you can find the person's identity and address (if using home IPs subpoena-able by asking the ISP).

I wonder if it's not just American police, imagine this question being asked by Russian FSB, or the "good guys" in the form of the Israeli authorities.