iPhone Help with JB/Unlock 3G 4.2.1 05.15.04

Discussion in 'Jailbreaks and iOS Hacks' started by leftkidney, Feb 22, 2013.

  1. leftkidney macrumors member

    Oct 23, 2009
    so about 1 or 2 times a year I am call upon to JB someones iphone since I am the only one of my friends who is smart enough to do something like that - I know that sounds stupid since I am asking this question but I dont do this every day so I am not up on the latest stuff and without trying to sound like a total dick I dont really have time to research everything I need so I would rely on the forums with really helpful users that dont mind helping someone with a simple question

    I have a 3G 4.2.1 (8C148) - 05.14.04

    can I just update using itunes to the latest that it will update for the 3g iphone, or is that the latest?

    do I have to do something with the ipad baseband, I remember that from before but I assume something has changed since then

    I want to Jailbreak install Cydia and Unlock the phone for use on tmobile or another gsm carrier

    thanks for the help
  2. 45357254 Suspended


    Aug 6, 2012
    Latest firmware for 3G is 4.2.1 (which probably can't run any app store application)

    ipad baseband isn't necessary anymore as long as you have the needed baseband of ultrasn0w.
    (4 -> 01.59.00)
    (3G/3GS -> 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00!)

    after jailbreaking , go into cydia and install ultrasn0w 1.2.8, and you are done.
  3. PsstGreek macrumors 68040


    Oct 21, 2010
    Tampa Bay
    Ultrasn0w can't unlock your baseband. You can purchase an IMEI (factory) unlock from Swift Unlocks for $1.99.

    Then you can jailbreak with redsn0w

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