[gears-users] cell towers triangulation

[egerm]

I'm trying to build application that require relatively accurate
location of the phone without GPS.
Geolocation API:
If I send several neighbor cell towers in the request to the JSON
server, I supposed to receive the triangulated location. However, I
always receive location according to the first cell tower in the
array. Moreover, signal_strength and timing_advance don't influence on
the result.
Is the problem in my script? Or this API doesn't have the full
functionality yet?