On 3/4/07, t3st3r <[EMAIL PROTECTED]> wrote:
<snip>
FYI: just to let you know, an anti-thief\anti-lost system for phones
already exists.Here is the story.Maybe someone already heard that
proprietary Siemens mobile phones (x55 series based on 80C166 CPU and
x65 and x75 series based on ARM9) were reverse-engineered deeply and
people has bypassed boot loader protection (preventing user's code from
being uploaded) so everyone can run it's own code on phone's CPU.Also I
heard some other vendors were hacked successfully as well.Some
SonyEricsson for example.
One of the first firmware patches has been the anti-thief subsystem.How
does it works?It does detects SIM card change (by IMSI checking IIRC)
and then SMSes to predefined number(s) (should be someone of your family
or friends of course).This reveals new phone number (allowing to take a
legal actions) and can allow owner to regain remote control, get
coordinates (actually, on Siemens phones you can get Cell ID at very
most, funny enough anyway).
But how does this affect resale of the device? Because then the new
owner inserts a new SIMcard, and then this mechanism would go active,
wouldn't it?
I'm just curious, it sounds like an interesting idea.
<snip>
---
Marcel de Jong
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