What info does a sim card contain?

[marklodge]

hi guys, i'm new here. and just wanting to know a few things thats bee
puzzling me a bit. ( used the search function to check if there are an
related posts but found none that answers the following questions)

What info exactly does a sim card contain?
If i were to push up a 960mhz (or any other cell frequency) antenna, ho
would i be able to communicate with it using a standard cellphone?

Basically i want to know what being a cellular service provider is al
about. i know about the astounding licence fees that they pay to set i
up etc etc, but i dont want to know all this. i just want to know how i
works, technically


--
marklodge

[John Henderson]

hi guys, i'm new here. and just wanting to know a few things thats been
puzzling me a bit. ( used the search function to check if there are any
related posts but found none that answers the following questions)
What info exactly does a sim card contain?

Google for the pdf file "3GPP 31.102".

If i were to push up a 960mhz (or any other cell frequency) antenna, how
would i be able to communicate with it using a standard cellphone?

Go to your phone's setup menu, and select the frequency band you
wish to use in the network settings. If the band isn't listed,
the phone can't operate on it.

Basically i want to know what being a cellular service provider is all
about. i know about the astounding licence fees that they pay to set it
up etc etc, but i dont want to know all this. i just want to know how it
works, technically.

It's going to be a baptism by fire for you. There's no easy way
into the technical stuff. It's complicated and it's precise.

John

[John Henderson]

If i were to push up a 960mhz (or any other cell frequency) antenna, how
would i be able to communicate with it using a standard cellphone?

You might find this a useful starting point:
http://en.wikipedia.org/wiki/OpenBTS

John

[marklodge]

-
If i were to push up a 960mhz (or any other cell frequency) antenna, how
would i be able to communicate with it using a standard cellphone? -
http://en.wikipedia.org/wiki/OpenBTS
John

Thanks for that. that was interesting. I read it fully.
I wanted to know how the current gsm technology used tho

[John Henderson]

Post by marklodge
I wanted to know how the current gsm technology used tho

Your best source is the GSM/UMTS technical specs, available for
free download from www.etsi.org While these are heavy reading,
they give you the greatest detail. UMTS is the 3G version of
GSM, and in many respects is a backwards-compatible evolution.
Aspects of the radio layer are radically different.

Once you get started, you'll be able to discern which additional
specs you want. Some GSM-era suggestions to begin with:

01.04
02.03
03.02
03.30
04.08
07.07

The pre-UMTS version of 3GPP 31.102 (SIM spec) is GSM 11.11.

If you're interested in SMS messaging, essentials include:

03.38
03.40
07.05

John