how can i jailbreak and unlock iphone 3g with baseband 02.30.03???

Discussion in 'Jailbreaks and iOS Hacks' started by yiannos9, Jun 24, 2009.

  1. yiannos9 macrumors member

    Joined:
    Sep 5, 2008
    #1
    i have an iphone 3g with version 2.2.1 and modem firmware 02.30.03.
    how can i jailbreak and unlock it so i can use my own carrier?
    i have searched all over the web and i read many guides but i dont quite understand how i will do it or if its possible to do it because of the firmware which is 02.30.03

    if anybody can help i would really appreciate it.

    thanks
     
  2. hamsup1o macrumors member

    Joined:
    Jun 13, 2008
    #2
    Not sure if ultrasn0w will work but you can go to Cydia and download 3G Fuzzyband Downgrader which will downgrade your baseband to 02.28.00. Then install yellowsn0w (also from Cydia) to unlock.
     
  3. bytethese macrumors 68030

    bytethese

    Joined:
    Jun 20, 2007
    Location:
    Cranford, NJ
    #3
    You don't. :)

    You upgrade to 3.0 and use redsn0w and ultrasn0w.
    http://blog.iphone-dev.org
     
  4. yiannos9 thread starter macrumors member

    Joined:
    Sep 5, 2008
    #4

    i dont have cydia installed for some reason.
    now what i do?
     
  5. yiannos9 thread starter macrumors member

    Joined:
    Sep 5, 2008
    #5

    my itunes dont recognise the phone and says that sim card is invalid .
    so i cannot upgrade to 3.0 and make the steps to jailbreak through redsn0w.
    how can i upgrade if itunes dont recognise the iphone?
     
  6. bytethese macrumors 68030

    bytethese

    Joined:
    Jun 20, 2007
    Location:
    Cranford, NJ
    #6
    Have you already tried putting the device in DFU mode and restoring? That will upgrade you to 3.0. :) Then all you need is red/ultrasn0w.
     
  7. benflick macrumors 68020

    benflick

    Joined:
    Jul 11, 2008
    Location:
    Cincinnati, Ohio
    #7
    Put the phone in DFU mode. iTunes will display a message that the phone needs to be restored. Shift+Click on restore (Option+click for Mac) and select the 3.0 firmware you downloaded.
    Or you can remove the SIM card before connecting to iTunes so you can update/restore without DFU mode.
     
  8. lakshi macrumors regular

    Joined:
    Feb 7, 2008
    #8
    Use latest itunes 8.2, download from apple site..
     

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