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I'm not sure that carriers keep the IMSI tower association records (vs. call or data transmission logging information). This would be a tremendous amount of inf
by URSpider94 12y ago
I'm not sure that carriers keep the IMSI tower association records (vs. call or data transmission logging information). This would be a tremendous amount of information to retain, since a given phone is always associated with at least one tower and may be re-negotiating its association thousands of times per day.
- icebraining 12y agoI believe they do. I'm hardly an expert, but on the Serial podcast, which details a murder investigation, cellphone tracking gathered from the carrier is introduced as evidence, and the events are described as "pings" (not calls, and probably not data since this was in the early 90s). I don't think they actually triangulate the position, they just know the tower the cellphone "pinged" and the approximate distance based on signal power. This would be a tremendous amount of information to retain Not really. An IMSI takes about 7 bytes, plus a few for location, let's say 12 bytes. Multiplied by, say, 2000 pings a day per user, by 300M users, that's just 7TBs/day, for all carriers. Facebook alone deals with 600TBs/day.