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Joined 1 year ago
Cake day: June 21st, 2023
  • Fondots@lemmy.worldtoNo Stupid Questions@lemmy.world•Since the government can theoretically access the location of everyone's phone, wouldn't it be unsafe for an undocumented immigrant to have a phone?
    3·
    5 hours ago

    I work in 911 dispatch

    The location we get from your phone isn’t exactly a magic “here’s exactly where this person is” button.

    For the most part, we rely on triangulation from the cell towers, which means the quality of that location is highly dependent on how many towers are around, how close you are to them, signal strength, the surrounding geography, whether you’re inside a building, in a basement, outside, etc. and the location isn’t constantly updating.

    I work in an area with pretty solid service, and at my cunter our policy is that if our ping is accurate to within about 300 meters we can use that if we can’t get any other location information from the caller, and most of the time we’re well within that, but not always. And a 300 meter radius is still a pretty big area, if that drops within a crowded downtown area, or if they’re in a high rise apartment or office building, that could be pretty much useless. And it takes us about 20 seconds to refresh the location and the new location may not be accurate when it does come in, so they’re in a moving vehicle they might well be a half mile away from where they were by the time the next ping comes in. And once you hang up we stop getting that location info and if we want to ping your phone again it’s a bit of a process that requires our officers or our dispatch supervisor calling the phone company, faxing or emailing them paperwork, etc. so not something we can just do totally on the fly, and for whatever reason the pings we get when we do that never seem to be very accurate, and it takes some time and we only get one ping at a time, and if we’re lucky we get one maybe every 10 minutes. We can also only request those pings when we have reason to believe that someone is in danger.

    I suspect that there’s a whole mess of local/state/federal laws and regulations, and department/agency/corporate policies that come into play with all of this with a million different exceptions, but overall that’s going to be broadly true in most places around the IS at least.

    We are starting to get more gps-based cellular location, this kind of depends on your phone’s capabilities and settings, what network you’re on, and your local 911 center’s capabilities. We’re generally a bit ahead of the curve on our technology and capabilities, so that’s not something everywhere can do yet. We’ve actually had it for a while but the implementation was pretty janky and not very useful, but we got some upgrades within the last year or so. It’s usually, but not always, more accurate than triangulation, the location updates faster, and we do continue to get location updates after you hang up but only for about a minute or so.

    Generally speaking, we also have no quick way of knowing who’s calling from a cell phone. Your name won’t usually come up on our caller ID, just your carrier. If you have your emergency info filled out on your smartphone and made it available we can access that, but frankly most people haven’t. If you’ve called before and given your name, we can search for prior calls (in our jurisdiction) from your phone number. Otherwise we can try our luck with some free phone number lookup websites, or try to get the subscriber information from your provider, and if you’re on some kind of a family plan that may mean we’d get maybe your parents information from the phone company not yours, and some prepaid plans don’t really seem to have much if any information on their subscribers on file so it ends up being a dead end.

    And that’s pretty much the extent of what we can do from 911. There may be other resources cops can use or other options for exceptional circumstances, but that’s outside the scope of 911 tracking your phone.

    Also if you call a non-emergency line, even if it’s one that redirects into a 911 center (we answer a lot of the departments when they’re out of the office, some of them just always come into us, and even if you reach someone at the station there’s a good chance they’ll transfer you to our central dispatch) we won’t get any location info and we need to go through the phone company to get a ping.

    And calls from TextNow numbers and other similar apps can be really hard to track down.