Unlocking a O2 UK iPhone 4 for t mobile USA

Discussion in 'iPhone' started by gab2012, Dec 2, 2011.

  1. gab2012 macrumors member

    Aug 21, 2011
    My brother lives in the UK and hes visiting us for a month here in Puerto Rico (we have a t mobile USA micro sim for him that is currently activated on a samsung galaxy S). He would like to use the iphone here instead. (yes he knows he will get EDGE speeds)

    He has an iphone with the latest baseband (ends in 0.8) and ios 5.

    A friend gave me a gevey sim for him and I heard I needed to downgrade the baseband (to end in 0.1).

    How do I do this? I've found mixed results googleing information on this, some claim its possible, others say it cant be done.

    Thanks for the help guys! :)
  2. gab2012 thread starter macrumors member

    Aug 21, 2011
  3. Gav2k macrumors G3


    Jul 24, 2009
    Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

    He can unlock his phone before he leaves the uk for £15 it'll then be sim free
  4. youknome macrumors 6502


    Nov 22, 2010
    Just get in touch with O2 and they'll unlock the iPhone for £15, that's what I did for my 3GS.
  5. gab2012 thread starter macrumors member

    Aug 21, 2011
  6. Dangerous Theory macrumors 68000

    Jul 28, 2011
    If it's under contract, they'll unlock it for free as long as he fulfils the rest of the contract.

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