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Thread: iPhone Dual-Boot

  1. #1
    killacam13 is offline -Hacks Hacker
    Join Date
    Aug 2007
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    The dev team has been using dual-booting to jailbreak the iPhone for several months now, however now that several more advanced techniques have been developed (many of which are still private), I thought it apropos to release this cool hack for those who would like to dual boot multiple versions of the iPhone software (or other OS's) from their handset. It's a neat little hack that I think might be useful for developers playing with 1.2.

    I'll walk you through a sample jailbreak scenario with 1.1.4, using 1.1.1, to show you what I mean. To do this, you will carve out a new partition on the iPhone and install version 1.1.1 on it. You'll then upgrade the iPhone to v1.1.4, which will leave the new partition intact. You can then dual-boot the iPhone, allowing you to mount 1.1.4's partition using the 1.1.1 partition. Once mounted, you'll make some changes to the mount points and install OpenSSH.

    Once you've got two versions of the OS functional, you can easily switch between them by changing your root-device. For example:

    nvram boot-args=“rd=disk0s3 -v”

    XDhow awsome...2 firmwares on 1 phone...

  2. #2
    LeifErikson's Avatar
    LeifErikson is offline Senior Member -Hacks Monk
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    Nov 2005
    Los Angeles, California
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    whoah! nice find!

    i bet this out be perfect for a 16gb iphone

    PSN: LeifErikson01
    If your life had a face, I would punch it -- Kim Pine <3
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