51–60 of 137 posts
Something like this would make it pretty easy to spot one of those stingray devices, I bet. Cell towers tend to stay put, so mapping out an area would go quick. Were a new 'tower' show up in an odd spot -- there may be shenanigans at hand.
On a related note, this same mechanism can be used as a fallback for GPS to determine device location. I have worked on an IoT device with builtin SIM in the personal alarm space. Often when a device is indoors no GPS fix can be found, but the GSM module can report all celltower ids in range with signal strengths. These can be used to triangulate the device location. Google has an API for this where you can pass celt…
I believe iOS may not bother involving the GPS if the application requests (or is only granted in iOS 14) approximate location, and there are enough towers in-range to triangulate. Not having to enable the GPS subsystems and get a fix saves a fair amount of battery.
It's quite hilarious seeing bunch of skilled and intelligent hackers being excited regrading process known as "Handover" :) It is well known, and well documented in every single book in subject... Worth to mention that there are 3 types of handovers: - Intra-relations: user can be switched between various cells at same tower. - Intra-relations but with handover to lower technology (let's say when 4g is not available[…
At this one industrial customer I visit every week for a full day, my Verizon cell phone date/time time will suddenly change back by 19 years, six months, and some days (I don't have the exact value). This has been going on for almost a year. My pet theory was that law enforcement turned on a stingray nearby back in 2020, it came up with a default date of 1/1/2001, and has been running ever since. Steel building with…
On a related note, this same mechanism can be used as a fallback for GPS to determine device location. I have worked on an IoT device with builtin SIM in the personal alarm space. Often when a device is indoors no GPS fix can be found, but the GSM module can report all celltower ids in range with signal strengths. These can be used to triangulate the device location. Google has an API for this where you can pass celt…
On a related note, this same mechanism can be used as a fallback for GPS to determine device location. I have worked on an IoT device with builtin SIM in the personal alarm space. Often when a device is indoors no GPS fix can be found, but the GSM module can report all celltower ids in range with signal strengths. These can be used to triangulate the device location. Google has an API for this where you can pass celt…
Are there any resources to that project? Comercial or free?
At this one industrial customer I visit every week for a full day, my Verizon cell phone date/time time will suddenly change back by 19 years, six months, and some days (I don't have the exact value). This has been going on for almost a year. My pet theory was that law enforcement turned on a stingray nearby back in 2020, it came up with a default date of 1/1/2001, and has been running ever since. Steel building with…
On a related note, this same mechanism can be used as a fallback for GPS to determine device location. I have worked on an IoT device with builtin SIM in the personal alarm space. Often when a device is indoors no GPS fix can be found, but the GSM module can report all celltower ids in range with signal strengths. These can be used to triangulate the device location. Google has an API for this where you can pass celt…