1. jayarjo's Avatar
    I always wondered if anything like this was possible. Does anyone know for sure? I mean imagine I got a not unlockable baseband on my iPhone. Can I upgrade it to an unlockable version, which came after it, but is not the latest at the moment?
    Last edited by jayarjo; 2012-01-16 at 05:06 PM.
    2012-01-16 05:04 PM
  2. b0bab0i's Avatar
    Depends on which phone you get.
    For 3g & 3GS, you can update to iPad BB, but you will lose GPS.
    You can use Gevey sim on iPhone 4 depending on which baseband.
    Currently theres no options for 4S, but they already sell factory unlocked 4S.
    2012-01-16 07:58 PM
  3. jayarjo's Avatar
    Only to iPad BB? I assume then that upgrading to iPhone BB of same version not possible? Any good writeup on why this is the case?
    2012-01-16 08:11 PM
  4. DanTheManMS's Avatar
    Ignoring the differences in hardware models for simplicity, here's the gist of it. Every iPhone baseband up to a certain point (I think around the one that came with iOS 4.0.1) can be unlocked with ultrasn0w. They managed to hack EVERYTHING up to that point, and NOTHING after that. Thus, since the hardware does not accept a downgrade in baseband version number, if you're on a baseband that cannot be unlocked, you're out of luck. The only unlockable basebands are below your current one.

    The only exception is the iPad one, and that's actually more of a trick than anything. You see, the iPad's baseband is actually a copy of one of the older iPhone basebands, and that particular iPhone baseband falls into the "unlockable" category. But, for some reason, Apple gave this iPad baseband a much higher version number, higher than any current iPhone baseband number anyway. So you can "upgrade" to this copy of an older baseband and unlock it, though as mentioned, it screws up GPS. And you can never change the baseband again until Apple starts including ones with version numbers higher than 06.15.
    Last edited by DanTheManMS; 2012-01-16 at 11:37 PM.
    2012-01-16 11:33 PM
  5. patoons's Avatar
    is the GPS loss definite? because i've read that it <i>may</i> screw up your GPS, may not... if so, what are the odds of this? out of curiosity
    2012-01-19 06:57 PM
  6. b0bab0i's Avatar
    is the GPS loss definite? because i've read that it <i>may</i> screw up your GPS, may not... if so, what are the odds of this? out of curiosity
    You will always lose GPS, but location services may still work because the phone may still use Cell Tower Reception to triangulate your position.
    2012-01-19 11:59 PM
LINK TO POST COPIED TO CLIPBOARD