[Gta04-owner] sim purpose?

NeilBrown neilb at suse.de
Fri Feb 10 23:51:33 CET 2012


On Fri, 10 Feb 2012 23:32:26 +0100 Flemming Richter Mikkelsen
<quatrox at gmail.com> wrote:

> On Fri, Feb 10, 2012 at 20:39, Jack Jones <sanctuarys3172 at yahoo.com> wrote:
> 
> > What is the purpose of a "Sim" other than to retain small pieces of data
> > in different channels,,it seems the credit is retained at the server end by
> > the provider who filters your useage and charges you accordingly for a long
> > while i thought the credit was held on the sim itself ,,this is not the
> > case and if you could swap sim;s quickly and  intervene at the correct time
> > of the "handshake" you would have  a free subscription or at least be able
> > to change provider.---is this correct??
> >
> 
> Short answer:
> The sim card is needed for identify your account.
> It is a little computer with memory... it has lots of
> security stuff.
> 
> Full answer would take more time...

An of course, someone took the time...

   http://en.wikipedia.org/wiki/Subscriber_Identity_Module

NeilBrown
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