"Today's episode is brought to you by listerine ready tabs small discrete tabs, the transform from a solid to a liquid just to switch and swallow no sink required to get that just brushed clean feeling, and they pack a huge punch up to four hours of fresh breath, and the confidence that goes with it on the go wherever life takes you to a surprise meeting a date you want to freshen up for or just from one event to another try listen ready tabs today. Find them near the mouthwash. Welcome to brain stuff from how stuff works. Hey, brain stuff, Lauren Vogel bomb here. Whether you're trying to order a ride or figure out what restaurants are nearby you've probably grown accustomed to the notion that your smartphone continuously tracks your location, but you may be surprised to discover that while phone apps seemed to be able to find you pretty easily nine one one. Operators can have a much more difficult time pinpointing your location in an emergency. When you call for help from a mobile phone. That's because wireless service providers, which are required by the Federal Communications Commission to provide callers locations to nine one one systems often are using data from different sometimes less precise sources than your phone uses to pinpoint a location, and according to the FCC website seventy percent of nine one one calls are placed from mobile phones in two thousand seventeen Sacramento TV station, FOX forty demonstrated. The extent of the problem by having a producer stand on a street corner. And make tests calls to the local county nine one one system using phones from several different wireless providers. They got disconcertingly varied results. One carriers. Data was able to pinpoint the caller's location within twenty six feet. That's about eight meters. While another Erin gave a location that was a mile away. That's just over one and a half climate hours. And that's a scary problem because when the nine one one system gets an inaccurate location and beans, the police the fire department or the ambulance crew may lose precious time trying to find you. That's the sort of delay that has tragically proven fatal in more than one case. So why does nine one one sometimes have more difficulty finding callers than say lift for decades, wireless providers have relied upon information from phones pinning cellular towers and from the global positioning system also known as GPS to provide location estimates for nine one one systems, you'd think that would work pretty well. But according to Evelyn Bailey, executive director of the national association of state nine one administrators and former head of Vermont's first enhanced nine one one system those methods aren't always so reliable. She said it depends upon the infrastructure. That's available where the caller is located. Let's say you're outdoors in a place where you're close to a cell tower in the GPS signal isn't obstructed, you're probably okay. But if you're out in the mountains, where cell coverage is spotty or inside a building containing lots of metal in a densely developed urban area. It could be a lot tougher. Your phone, though, has other ways to locate you, thanks to technological advances by mobile phone manufacturers. Your device can use your proximity to WI fi networks and bluetooth beacons and even readings from the barometer that you probably didn't realize was built into your phone that data comes from what's known as the user plane and historically wireless carriers haven't trusted it as a location source to fulfil their regulatory obligations. But even if they did Bailey notes that existing nine one one systems aren't engineered in a way that makes it easy for them to accept that data into their location stream. Fortunately, though, the wireless telecom industry and organizations representing the nine one one. Systems have been working together for years on finding technological solutions. And as of two thousand fifteen the FCC issued new regulations that set a timetable for improving. The accuracy of the location information the carriers provide to nine one one by twenty twenty one they have to be able to provide a dispatch -able location at least eighty percent of the time dispatch Colocation, meaning one that's within one hundred sixty four feet or fifty meters of where a caller is located. Also, they have to be able to provide barometric pressure from any phone that measures it which could make it easier to pinpoint altitude and figure out what floor in a building. A caller is calling from the industry is also working on developing and testing the national emergency address database. This include the locations of wifi, hotspots, bluetooth, beacons and other parts of the modern world electric infrastructure, eventually the database will be able to accept data that consumers provide about their home wifi networks if they choose to provide it. This episode was written by Patrick j Hyder and produced by Tyler clang for iheartmedia, and how stuff works for more on this and lots of other pointed topics visit our home planet house to works dot com. Hey, Brian stuff listeners today. I wanted to tell you about another podcast how to money, which is not your typical personal finance podcast, the hosts Matin Joel are best friends. Aiming not to lecture you but to make conversations about money. Interesting informative even fun every Wednesday. They cover real life money topics like ways to cut your grocery Bill. Why your house is an awful investment, and how to achieve financial independence, if you kind of suck at money, or if you just want to learn more about how you can support yourself and your future, you can listen and subscribe on apple podcasts the iheartradio app or wherever you get your podcasts. Just search for how to money."