iOS 3.1 How to downgrade modem firmware iPhone 3G 5.12.01 to 5.11.07

Discussion in 'iOS Jailbreak & Cydia' started by Ma-knowledge, Mar 9, 2010.

  1. Ma-knowledge

    Ma-knowledge New Member

    Joined:
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    Device:
    iPhone 3G (Black)
    I have a iPhone 3G 3.1.2 with the modem firmware 5.12.01.
    I want to Unlock it what should I do? I guess that i need to downgrade the modem firmware to 05.11.07 right? but how?
    ------------------double post merged------------------
    I have a bootloader of 06.04

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