ÚÄÁÄ¿ ÚÁ¿ ÚÄ¿ ÚÄ¿ ÚÄ¿ Ú¿ ô ô 1-FEB--89 Ú¿ ÉÍÏÍÍÍÏÍÏÍÏÍÏÍÏÍÏÍÏÍÏÍÏÍÏÍ»ÀÂÙ ³ÃÄÄĶ THE DNA BOX ÇÄÙ ô³³ Ú¶ Hacking Cellular Phones ÇÄÄÄÄ¿ ÀÁ´ õÈÑÍÑÍÑÍÑÍÑÍÑÍÑÍÑÍÑÍÑÍÑÍÑÍѼ ÚÁ¿ õ ' ` ' ` ' ` ' ` ' ` ' ` ø ÀÄÙ Â P A R T T H R E E ô ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ Previous DNA files discussed the possibility of using Japanese handheld HAM radios and personal computers, or tape recorders to hack Cellular Phone codes, and possible uses for investment & business info obtained by hacking executive and corporate phone calls, and investment info services, as well as approaches to modifying the Cellular Phones themselves for use as hacking tools and pirate communication devices. Here using and modifying UHF-band radio scanners to hack and monitor Cellular and Mobile telephone systems will be dealt with. Radio Shack, Uniden, and several other manufacturers make scanners for use by amateur radio hobbyists. Most of these will intercept mobile radiotelephone calls without modification by tuning in frequencies in the 156 MHz and 475 MHz regions. Most of these scanners have line-level audio outputs that can feed a tape recorder or demodulator/tone decoder chip which can then interface directly to a computer for analyzing codes. Mobile phones use a tone-pulse dialing protocol that should be simple to decode and emulate using standard handheld ham radio gear. You can almost count the dialing beeps without any special equipment. Phone channels are easy to find: they usually broadcast a standard busy signal or an idle tone (a fixed audio sine wave) when waiting for the next call. You will also hear conversations, ringing, and mobile phone operators on these channels. Here's a partial list of frequencies used by mobile phones: (frequencies in MHz) 152.51 154.57 152.66 152.69 152.72 152.78 154.54 475.45 475.475 475.55 475.6 475.8 475.825 475.85 475.9 476.05 As you can see, many of the frequencies are spaced 30KHz or 25KHz apart, so there are probably more channels in the gaps at those intervals. These frequencies were gathered in a few minutes of casual listening using an unmodified Radio Shack Pro-2021 scanner in search mode. SCANNING CELLULAR FREQUENCIES: Hobby scanners capable of monitoring Cellular Phones are prohibited in the US. To save money on the production line, many international scanner manufacturers make only one kind of scanning chip which they use in both US and foreign models. These chips are capable of scanning in the 800MHz range but this feature is diabled by grounding certain pins in the US models. Often restoring Cellular scanning functions is merely a matter of cutting a circuit trace or removing a single diode from a scanner's printed circuit board. For instance, removing diode 513 from a Radio Shack Pro-2004 Scanner will enable the 870MHz Cellular range. Installing diode 510 will increase the number of scanning channels from 300 to 400. Installing diode 514 will increase the scanning rate from 16 to 20 channels per second. These are located on the printed circuit board labeled PC-3. The Uniden Bearcat 200/205XLT can be modified for Cellular scanning by cutting or removing the 10K-ohm resisitor located on the printed circuit above the letters "DEN" on the microprocessor chip labeled "UNIDEN UC-1147". The Regency Electronics MX7000 Scanner reportedly scans Cellular Phones without modification. An additional scanner rumored to be modifiable is the Realistic Pro-32. Another source of useful radio gear are "Export Only" manufacturers. One of these is currently rumored to be offering a handheld cellular phone that does it's own routing and has an operating radius of 160 kilometers! CELLULAR PHONE FREQUENCIES: Here are the frequency range assignments for Cellular Telephones: Repeater Input (Phone transmissions) 825.03 - 844.98 Megahertz Repeater Output (Tower transmissions) 870.03 - 889.98 Megahertz There are 666 Channels. Phones transmit 45 MHz below the corresponding Tower channel. The channels are spaced every 30 KHz. CORDLESS PHONE FREQUENCIES: It's also possible to hack the popular cordless phones. These use the 49MHz band used by baby monitors and toy FM walkie talkies. Scanners can be used to monitor these without modification, and FM handheld transceivers will allow 2-way hacking of these frequencies, which some may find amusing. Channel Handset Transmit Base Transmit ------- ---------------- ------------- 1 49.67 46.61 (frequencies in Megahertz) 2 49.845 46.63 3 49.86 46.67 4 49.77 46.71 5 49.875 46.73 6 49.83 46.77 7 49.89 46.83 8 49.93 46.87 9 49.99 46.93 10 49.97 46.97 Business Update: As of January 1989 there are legal maneuvers going on to lift the ban on portable phones by traders at the NY Stock Exchange. ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ The DNA BOX - Striking at the Nucleus of Corporate Communications. ³ õ A current project of... Á Outlaw Telecommandos º³Ý³³Þº³Ýݳ³Þ³Ý³º º³Ý³³Þº³Ýݳ³Þ³Ý³º º01-213-376-0111º Downloaded From P-80 International Information Systems 304-744-2253