Update Iphone 3gs by ios 5.1.1...?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by ya.ali, Nov 14, 2012.

  1. ya.ali macrumors newbie

    Joined:
    Nov 14, 2012
    #1
    Hello Everyone

    i want to update my iphone 3gs from ios 4.2.1 to 5.1.1.
    my iphone information is following

    Carrier:AIRTEL
    CAPACITY:14.2GB(16GB)
    VERSION:4.2.1(8C148a)
    CARIAR:Carrier 9.0(VADAFONE LTD.)
    Model:MC131B
    SERIEAL:86952WV53NP
    IMEI:01 216000 ?????? ?
    FIRMWARE:06.15.00
    COUNTRY:UNITED KINGDOM
    SIMID:23415
    iBoot: NewBootrom 359.3.2

    Now question is...???
    How to update my iphone 3gs by 5.1.1 without losing baseband (6.15.0) using redsnow.

    Note: Phone is currently unlock and jailbroken.

    thanks for any kind of help.
     
  2. stonyboys macrumors 6502

    Joined:
    Oct 16, 2012
    #2
    I'm not up to date with jailbreaking, but if you don't want to upgrade baseband because of unlock, there's no need to worry because now that your phone is unlocked, it's permanent no matter the baseband.
     

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