iPhone 3G downgrade error 1015 help?

Discussion in 'Jailbreaks and iOS Hacks' started by mikalh78, Jul 1, 2010.

  1. mikalh78 macrumors regular

    Oct 21, 2008
    So I accidentally upgraded my phone to the 4.0 os and after a few days of hell trying how to get the phone out of restore mode and downgrade I finally got 3.1.3 on it. But the thing is that I need the phone to be unlocked. I tried to use a custom IPSW but everytime I do it it gives me error 1015. How can I jailbrek this phone so that I can get Cydia and ultrasn0w back? As well the base band is 5.13.04.
  2. Bl0ckHe1d macrumors 6502


    Nov 19, 2009

    although the title is for a 3Gs however the link in the post is also instruction for downgrading your 3G

    jailbreak will be the same methods as before using Redsn0w/spirit/blackra1n, you may need to use the previous version prior to the iOS4 upgrade, check the iclarified website!
  3. mikalh78 thread starter macrumors regular

    Oct 21, 2008
    so i tried using sn0wbreeze and made a custom restore but now im getting error 1600. i have the 3.1.3 firmware.

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