IPhone 3g 4.2.1 problem with jailbreak

Discussion in 'Jailbreaks and iOS Hacks' started by Aromero975, Nov 3, 2011.

  1. Aromero975 macrumors newbie

    Nov 3, 2011
    Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 3_1_3 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7E18 Safari/528.16)

    I have a iPhone 3g firmware 4.2.1 (8c148). I have been trying to jailbreak to change carrier to t mobile. Downloaded redsn0w and firmware but the firmware I got cannot be recognized. Have tried other firmware downloads but they never come as .ispw file so redsn0w won't recognize. I am using windows 7. Baseband is 05.15.04. If anyone can help me I will greatly appreciate

    Ps. Tried greenpoison too and all it does is tell me to try again and phone needs to be restored.
  2. labman macrumors 604


    Jun 9, 2009
    Mich near Detroit
    1st youneed to unlock your device sorry jailbreaking and unlock are different. 2nd you can't unlock that baseband.

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