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Discuss Anyone know what part of unlocking changed the devices IMEI? at the iPhone "2G" (Rev. 1) - Hackint0sh.org; When I was trying to downgrade, I noticed my IMEI isn't what the device is ...
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    Default Anyone know what part of unlocking changed the devices IMEI?

    When I was trying to downgrade, I noticed my IMEI isn't what the device is supposed to be. Found quite a few folks are complaining about that. Does anyone know what part of unlocking made the change and how to change to change it back (or was that part of the unlocking)?



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    Quote Originally Posted by thasan View Post
    When I was trying to downgrade, I noticed my IMEI isn't what the device is supposed to be. Found quite a few folks are complaining about that. Does anyone know what part of unlocking made the change and how to change to change it back (or was that part of the unlocking)?
    Clearly, the 1.1.1. upgrade program finds this IMEI in the BB. As a result, during the BB flash, it takes this incorrect information and uses it to flash the new BB. Since it appears that only AnySim unlocked phones are prone to this problem, I would assume that the Dev Team used a cut/paste of an unlocked phone with the same chipset as the iPhone to create their unlock?

    So why did it work the first time and not after the upgrade? I assume that it's because either 1) the IMEI is mentioned in several locations in the BB and Apple studied the unlock and decided to use the second location in order to screw up the upgrade, or 2) because during the patching under 1.02, the IMEI is in memory and when the BB is patched by AnySim, the fact that there's a different IMEI in there didn't make a difference, since the phone ignores it in favour of the IMEI in memory?

    Irrespective of the how's and why's or why it worked before and doesn't work now, what's clear to me is that this IMEI makes its way into the BB after the patch and during the upgrade it's this information that is retained by the installer and used for the upgrade of the BB. Make sense? (question is, though, does the installer update the EEPROM with this information? This would be very bad!)

    The IPSF unlock is not subject to this problem since they program the EEPROM first and then overlay the BB with a fresh copy.
    Last edited by Snowbird; 10-01-2007 at 10:31 AM.

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    @Snowbird,

    Thank you very much for the explanation. So, this may get fixed but I shouldn't hold my breath on it I guess?

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    Snowbird's explanation is not exactly accurate. The IMEI you see after dev team unlocking is because iUnlock/anysim generates an invalid token. This works as long as you have the patched firmware, but once that is gone by reflashing to a stock version, this puts the phone in a diagnostic state that reports the 0049 IMEI. The explanation on the IPSF website seems to be accurate, or you can read through http://hackint0sh.org/forum/showthread.php?t=8612

    By the way, the real IMEI of your phone has not changed. The 0049 IMEI is reported only if you have a SIM in your phone (which prompts the baseband to do a SIM check and enter the error mode). If you take your SIM out and reboot, you should see again the correct IMEI.
    Last edited by mr_; 10-02-2007 at 01:03 AM.

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    It's because the line says if invalid than unlock and that's why we could unlock the iphone.


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    hmmm, i donīt agree to all,
    my iPhone has been unlocked with anysim
    and my imei is still the same like on the box!

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    Quote Originally Posted by pendalf View Post
    hmmm, i donīt agree to all,
    my iPhone has been unlocked with anysim
    and my imei is still the same like on the box!
    Yes, because your baseband has the patched firmware. If you reflash to stock 3.14 firmware and then put a SIM in the phone, you will get the invalid IMEI. If you reflash to the patched 3.14 fw, all will be fine again. If you upgrade to 1.1.1 (not a good move at this point), you also get stock firmware (but for now that's irreversible), and when you put a SIM in the phone you will again get the invalid IMEI.

    As said above, the dev team patch makes the baseband firmware ignore the invalid token. Without the patch, the firmware reports invalid SIM and reports the invalid/diagnostic IMEI.

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    Quote Originally Posted by pendalf View Post
    hmmm, i donīt agree to all,
    my iPhone has been unlocked with anysim
    and my imei is still the same like on the box!
    Have you updated to FW 1.1.1 and downgraded to 1.0.2 again?
    I think there is a little bit of misunderstanding on when the 0049 IMEI appears.

 

 

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