Peace be upon you smokeLook, SIM card has memory a...

2008-02-20T18:49:00.000+02:00

Peace be upon you smoke

Look, SIM card has memory and it is good enough to contain your phone book and SMS, also this SIM card hold the code of the application that run on the SIM card, also there is hidden space for the Card OS, the need of SMS, depend on the application that runs on the SIM, old days it was some kind of logical bug,
this logical bug is, When you start a call, you can remove the SIM card so, the mobile will work for while, but as far as I know, there is some kind of control channel that request things, for example,

if you are talking and moving from cell to other cell, this operation will need a control channel operations, if the mobile didn't find the SIM, you will have a nice message on the screen "Insert SIM"

I will try to provide more information with references to help anyone needs it

Thanks for your time

Thanks for your reply smoky ;)

BR
Ahmed Essam

Wow, Ma Shaa Allah, rabena yezeedak men 3elmoi lik...

2008-02-20T18:25:00.000+02:00

Wow, Ma Shaa Allah, rabena yezeedak men 3elmo
i liked the article so much, now i understand the mobile is a midtire between the network and the sim, but i thought the sim is keeping small amount of information and the sim ID only, i heard in the past that u can remove the sim while talking on the phone ? i though that the mobile used the sim ID to initialize the Voice Call, and then no operation on the sim anymore u can remove it.

again, i thought if you can copy this memory area u can duplicate the card.

now i believe the internal smart-sim processor and os are for the security purpose, the reason they give a limited APIs to limit the operations.

thanks NEOz
smoke

Comments on Neo Official: SIM card and Mobile

Peace be upon you smokeLook, SIM card has memory a...

Wow, Ma Shaa Allah, rabena yezeedak men 3elmoi lik...