The 9x group has been around since 1995. Since their arrival into the hacking and phreaking scene, scores of articles, programs, and wardialling scans have been made available. They are definitely worth checking out.
Cellular Mobile Carrier Intrcon.
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hacking the cindi VMB
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basic cellular guide
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Phone Cabling with BIX blocks and AT&T frames
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Blue Boxing Through CitiBank Venezuela
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AT&T inflight satellite phones
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Hacking the AS 400 os
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About ANI
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the analog cellular system
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Hacking AllTel VMBs
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Advanced Communications Tech. Satellite
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How to setup 888 #'s
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IBMs 4690 mainframe
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intro to datapac
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Inpho on 1Connect VMBs
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Data on 10 codes
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more on GSM
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