How does the Gevey Sim work behind the scenes?

Discussion in 'Jailbreaks and iOS Hacks' started by SteveNewton, Nov 4, 2011.

  1. SteveNewton macrumors newbie

    Oct 13, 2009
    What exactly does a Gevey Sim does behind the scenes to unlock iPhones. Curious about the technical details.
  2. Boogsephine macrumors 6502

    Feb 28, 2011
  3. Siggen macrumors 6502

    Apr 1, 2011
    Oslo, Norway
    I don't know the details, if i new em apple would also and then they would block it.

    But the phone is the one that checks if your sim is blocked, the baseband is its own computer (soc, system on a chip). Its as i said done locally and thats why a "simple" "turbo sim" works.

    What it does is intercept the way the sim identifies it, and since its a pain in the ass and doesn't work more than 1/5 of the time, i suspect it uses a buffer overflow (google it) to insert code (im not sure).

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