-=> Quoting Dave Nemeth to Tom Marks <=-
 DN> Tom Marks wrote in a message to All:
 
 DN> That's not the way I heard it. Every radio transmitter is unique in
 DN> the way it  keys up, comes up to power and stabilizes on frequency.
 DN> This is like a  fingerprint. No two transmitters are exactly the same.
 DN> Authentication is a  record of your cell phone's signature. Every time
 DN> you make a call (perhaps  every time you turn it on?) the cellular
 DN> carrier compares the signature your  phone has with the database
 DN> signature. If they match, fine. If not, your call  will not go through.
 DN> Presumably, if you have repairs done to your phone that  change this
 DN> fingerprint, your carrier will have to establish a new database  enty
 DN> for your phone. 
 DN> Is this correct anyone?
That sounds more like RF Fingerprinting to me, where they watch your
frequency because every different type of phone, (not every different phone
mind you) transmits differently I suppose, and that is what they watch out
for.  They also have authentication though, which I still don't understand.
... No person ever became wicked all at once.
~~~ ReneWave v2.00+
--- Renegade
---------------