Will T-Mobile work on any iPhone4 baseband?

Discussion in 'Jailbreaks and iOS Hacks' started by rfs2005, Apr 9, 2012.

  1. rfs2005 macrumors member

    Jul 20, 2008
    The title says it all... I will soon be getting my old iPhone4 unlocked through the new AT&T policy. Part of the procedure requires me to backup/restore with iTunes. Will updating the OS (and baseband) to the latest version work if I plan to use my newly unlocked phone with T-Mobile? Jailbreaking is not important to me right now, at least not at the moment. I just want to make sure T-Mobile will work on newer basebands, as it is nearly impossible to downgrade basebands if I make a mistake by upgrading to a newer one.

  2. Sine Qua Non macrumors member

    Apr 4, 2011
    1. You don't really need to do a full restore for the AT&T official unlock to take effect.

    2. Any baseband will work on T-Mobile if the phone is officially unlocked.
  3. heyyitzmelissa macrumors 6502

    Jan 17, 2012
    Don't restore, just use Deactivate option in redsn0w

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