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- *****************
- A Cellular Guide*
- By: Downtime *
- *****************
-
- Contents
- ~~~~~~~~
-
- 1) Some of the Cellular Phone Basics
- 2) The reason for the name Cellular.
- 3) Review of the Cellular System.
- 4) What goes on during Cellular Calling.
- 5) Cellular Cloning and Other Features.
- 6) Basic Test Mode Programming
- 7) What kind of Cellular is Best?
- 8) Where is the Cellular Technology Going?
- 9) Closing
- _____________________________________________________________________________
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-
- Introduction
- ~~~~~~~~~~~~
-
- We have all seen them, heard about them, and most people use them. What am I
- talking about? None other than the Cellular Phone. One of the most interesting
- things ever that is associated with the Phreaking Community. This guide will
- not tell you how to do illegal things with your cell but this will give you a
- basic view of how the cellular phone works. Enjoy!
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- 1) Some of the Cellular Phone Basics
-
- The main thing to remember about a cellular phone is that it is a
- radio. It is basically like a hand held walkie talkie except with a cellular
- phone you have alot more capabilities and can talk and listen at the same
- time. Remember though that when you are talking on a cellular phone what you
- say may and possibly will be monitored very easily. There are two main types
- of Cellular Phones Analog and Digital.
-
- 1) Analog: On this the audio is modulated directly onto a carrier
- 2) Digital: On Digital, these are converted to digitized samples.
- These are transmitted as 1's and 0's. Then it is converted
- back to voltage so you get the audio signal.
-
- Each Cellular Phone has to identify itself to its cell site before
- service is allowed. They are identified by what is known as an ESN and a MIN.
-
- 1) ESN: This stands for Electronic Serial Number. This is a 32-bit
- Binary Number if I am not mistaken.
- 2) MIN: Mobile Identification Number. This is the phone number of the
- Cellular Phone. 10 digits including area code and all.
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- 2) The Reason for the name Cellular.
-
- The reason for this is that in each city the Cellular Phone System is
- divided into smaller sections also referred to as cells. These usually have an
- antenna on top of a high surface that gives out strong signals therefore giving
- you clear service.
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- 3) Review of the Cellular System.
-
- The main system operating in the United States is the AMPS, Advanced
- Mobile Phone System. The AMPS are composed of two different things:
-
- 1) EAMPS: This system has 832 channels.
- 2) NAMPS: This system has three times the amount with very clear
- signals.
-
- All these have 42 channels that are used to setup calls the rest are
- for talking over the Cellular Phone.
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- 4) What goes on during Cellular Calling.
-
- Just imagine if you are stranded somewhere or possibly just want to
- use your cellular phone to call someone. Have you ever wondered how it worked?
- Why it worked? If so then I will explain how and why in this section here.
- Enjoy!
-
- 1) Scan Channels: In this step the cellular phone scans for the
- closest cell site near you so that you can get
- the strongest signals possible due to your location
- at the moment.
-
- 2) Choose Strongest: As stated above the cellular phone finds the
- closest site to give you the best performance.
-
- 3) Send Message: The phone sends a short message to the cell site
- verifying the MIN, ESN, and the number that you
- have just entered to call.
-
- 4) Assign Channel: After verifying the above information and they
- know that you are a legal paying customer, the
- base assigns a mesage to your phone, telling it
- where the conversation is.
-
- 5) Talk: Phone then gets on that channel and begins to ring. Then
- you begin to talk like normal. The easiest step of them all.
-
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- 5) Cellular Cloning and Other Features.
-
- Cellular Cloning is one of the newest and more popular things going
- on now a days. What you are basically doing is programming someone else's
- MIN and ESN into your phone in the process of fooling your cellsite into
- thinking that you are actually them. Is this legal? Well it depends on which
- way you use it. If you use it to clone one of your own phones where you can
- have two phones exactly the same then no, but if you are cloning someone
- else's then yes it is very illegal. The philosophy of a cellular phone phreak
- as stated in another text written by John Markoff is to push the machines as
- far as they would go. The possibilites with a cellular phone are practically
- endless. You can make one into a scanner as well as many other things.
-
- The first step of being able to do ANY of this is getting the cellular
- phone into what people call test mode. This is where you can practically change
- the whole phone's features. The main way to get into this is to crack the access
- code. There is a good site that deals with that at the following URL:
- http://www.radiophone.com They have great information. Another way to get a
- cellular phone is by taking the battery pack off of the back and look in the
- lower corner. Here you will see some little prongs, you can get a small piece
- of tin foil and place it in the center of the prong like so: |*|
- then put the battery pack back on the back of the phone. Then turn the phone
- on and when you turn it on you should see an array of flashing numbers. If
- so you are in luck because you are in test mode! :)~
-
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- 6) Basic Test Mode Programming
-
- This section will tell you what to do once you get into the test mode.
- This part comes from 1993 Cellular Subscriber Technical Training Manual. I
- give full credit to them for this information. I am not going to include all
- of it because it would take forever. Here are some of the basics. Enjoy!
-
- 32# = clear the phone
- 38# = displays the ESN
- 55# = test mode programming
- 01# = restart
- 13# = power off
- 16# = setup
- 18# = send NAM
- 34# = turn DTMF off
- 61# ESN transfer
-
- That is jsut some of the very basics. Of course there is alot more
- and if I ever write another article with Cellular Phones I will include some
- more. Don't want to get very much ahead of ourselves. :)
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- 7) What kind of Cellular is Best?
-
- There are different kinds of cellular phones for different kind of
- people. Me personally I have experience so far with only Motorola. I plan to
- get a Nokia soon. Nokia are very advanced and have many options. There is also
- the OKI those have been stated to be good. The one that interests me at the
- moment are these new ones that are Java based. If you would like to read more
- about these go to the following URL:
-
- http://www.nortel.com/cool/norteledge/edge298/N._IP_N.html
-
- But as stated above many people like many different things, there is
- also a new Motorla that is the IDEN I10000. These have two-way radio and
- alphanumeric pager in one. These weigh in at around 5 oz. as well.
- They also include: One touch call back, a speakerphone, and a multilanguage
- operation that displays prompts in one to four different languages. For more
- information on this you can call: 1.800.453.0920
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- 8) Where is the Cellular Technology Going?
-
- This is a very interesting thing to think about including all the
- things that they already have out and available at this point in time. There
- is no way to actually predict what is going to come out next due to people
- having new ideas with each and every passing day. It should be an interesting
- thing to think forward about. Whatever it is, it will turn heads I am sure!
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- 9) Closing
-
- We have seemed to read the end of this guide. I hope this has been
- an informative source and you enjoyed it. I will probably write another cellular
- guide in the future but am not sure at the moment. Remember "Push the Machine
- as Far as it will Go!" =)
- _____________________________________________________________________________
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- 10) Shout Outs
-
- 1) DarkCyde: Keeping it real!
- 2) #9x: Great channel
- 3) Slinker aka _14k4: For getting me interesting
- 4) T0n3 K1LL4H: For being there for me
- 5) GrinnDaddy: Helping me along the way
- 6) Sparky: Being a good friend
- 7) Twisted Nickel:
- Sim
- Digital Fokus
- Voltage
- Vyle
- If I left any of ya guys out, ya know who ya are!
-
-
-
- EOF
-