iPhone 3G downgrade iphone 3g 5.12.01 modem fw to 5.11.07

Discussion in 'iPhone' started by applehacker, Aug 21, 2010.

  1. applehacker

    applehacker Banned

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    I have a iPhone 3G 3.1.3 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?i want blackra1n unlock which works on 5.11.07 fw
  2. ripply

    ripply Active Member

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    Jailbreak and unlock with Ultrasn0w from cydia
  3. bobby681

    bobby681 Active Member

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    You can't downgrade basebands (99% of the time). ultrasn0w jailbreaks that baseband firmware though

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