[UA] Our modern mobile world

[Doug Stalker]

Will wrote:
> 

> The way it works (I guess it also depends on technology) is like a hive of
> cells, and they can detect in which cell you were. 

They can triangulate for even more accuracy - check the signal strength
to a few base stations in the area, work it out from there.

Knowing the cell alone isn't always enough - I know someone who
currently holds the australian record for longest distance to base
station - he was on top of a mountain in New South Wales, and freak
atmospherics let him place a call using a base station in Tasmania
(hundres of kilometers away).

A hacked phone could randomly choose a base station from the available
ones available, rather than choosing the one with the srongest signal -
sounds liek a good TNi gadget.



> I think some manufacturers worked on bi-bands handsets, allowing you to
> call almost anywhere in the world. I'm pretty sure Nokia did one.
>

I have an Ericsson T-28, which will do GSM 900 or GSM 1800.  Other
handsets provide different combinations of protocols.

 - Doug


-- 
_____________________________________________________________
  Network Operations Engineer - Big Pond Advance Satellite
 Ericsson Australia - Level 5, 184 The Broadway, Sydney 2000
  Ph: +61-416-085-390   Email: doug at satellite.bigpond.com

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