Yep, it's called cell id location. I worked in mobile phone location about 8 yea...

iang on April 21, 2011 | parent | context | favorite | on: Apple is not “recording your moves”

Yep, it's called cell id location. I worked in mobile phone location about 8 years ago and you could find a rough position (about 200m radius IIRC) and we used it as a first pass. That was on GSM networks, 3G cells are smaller.

metageek on April 21, 2011 [–]

And the newer E911 requirements which kick in next year call for 100m accuracy.