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originally posted by: tothetenthpower
originally posted by: Tusks
When the phone is turned off, can it still be tracked?
Without physically removing the source of power from the contacts, your phone is always technically 'on'. Pull your battery, then you're good.
As long as the current flows then the device can be accessed through a number of means.
originally posted by: scubagravy
a reply to: MarlinGrace im in Australia, and I still use as a nokia that's about 12 years old, it messages, it calls, stopwatch, camera (which I don't use). I'm also not involved with facebook or instagram or any other crap, and im quite happy bout it.
originally posted by: MystikMushroom
a reply to: tothetenthpower
I've heard that even that doesn't work -- as there is a tiny backup power source that keeps the clock/settings for you in case you need to swap batteries.
originally posted by: The Vagabond
I can't imagine any very realistic uses for that level of tracking- unless they wanted to have a sniper shoot you through a solid wall or wanted to know for sure you weren't looking out the window as a swat team stacked up- but that just seems like overkill. Once there's a use for it though, it won't be long before you hear they have the capability.
originally posted by: generik
i'd say it is rather accurate. there is even a cellphone game Ingress that is reliant on accurate locations around the world to play.
transmits a low-power WiFi signal and uses the reflections that bounce back to track motion. It can monitor tiny movements every second, such as the rise and fall of a person’s chest, determining heart rate with 99% accuracy. The system is able to differentiate between up to four people and even if you’re in a closed room or hiding behind a wall, the signal will still reach you.
Abstract– Recently, we have witnessed the emergence of technologies that can localize a user and track her gestures based purely on radio reflections off the person’s body. These technologies work even if the user is behind a wall or obstruction. However, for these technologies to be fully practical, they need to address major challenges such as scaling to multiple people, accurately localizing them and tracking their gestures, and localizing static users as opposed to requiring the user to move to be detectable.
This paper presents WiZ, the first multi-person centimeter-scale motion tracking system that pinpoints people’s locations based purely on RF reflections off their bodies. WiZ can also locate static users by sensing minute changes in their RF reflections due to breathing. Further, it can track concurrent gestures made by different individuals, even when they carry no wireless device on them.
We implement a prototype of WiZ and show that it can localize up to five users each with a median accuracy of 8-18 cm and 7-11 cm in the x and y dimensions respectively. WiZ can also detect 3D pointing gestures of multiple users with a median orientation error of 8−16◦ for each of them. Finally, WiZ can track breathing motion and output the breath count of multiple people with high accuracy.