Cell Phone Overview (not Mine)

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[Cell Phones] - By Kript0n (Version 1.0)

[Contribution to Black Sun Research Facility]

[Parts of this text by Extrem Dreames]

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http://blacksun.box.sk

[Table of Contents]

.Intro

.Intro Q&A

.Getting to Business

.The numbers

.Cells and frequencies (info & tables)

.Programming the NAM

---------------------------[Intro]----------------------------

Cell phones. Everybody knows what they are. But haven't you

tried to understand them a little better? Like, how the hell

your cellphone connects to the "server" or shit like that?

Well, this tutorial reveal some of these secrets, and invite

you to research a little. Dive into the world of DTMF...

By the way... This tute is not very easy to understand at

first sight, because it has a lot of technical only information.

I know that. If you have any doubts mail me at bitchz@usa.net

-------------------------[Intro Q&a]--------------------------

Q: What is a cell phone?

A: A 800 mhz radiotelephone, running 3 watts, with the ability

to change channel on computer command from the central switch.

This happens when you travel through

the service area and your

signal becomes stronger at a neighboring cell base station.

Q: They are marketed as a high security device with no

possibility of anyone making a phoney call and charging it to

someone else, how can it be phreaked?

A: An understanding of the phone reveals that every time a call

is made, the phone number,an electronic serial number, and

other data is sent to the switch. If you were to listen to the

oposite side of the control channel as the call is being "set-up"

you would hear this data being transmitted to the switch in NRZ

code (non-return to zero). All one has to do, is record this

info and program the bogus phone to these params and a free call

is possible through

the switch.

---------------------[Getting to business]----------------------

.Behind the calling process. An intro to the magic numbers:

When a cellular phone makes a call, it normally transmits it's

Electronic Security Number(ESN),Mobile Identification Number(MIN),

it's Station Class Mark(SCM) and the number called in a short

burst of data. This burst is the short buzz you hear after you

press the SEND button and before the tower catches the data.

These four things are the components the cellular provider uses

to ensure that the phone is programmed to be billed and that it

also has the identity of both the customer and the phone.

.The Hack Begins

The ESN and the phone number (MIN) are the two primary identifiers

for any cellular phone. By changing both, the cellular carrier

will accept the call and bill