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Discuss [Question] how does a factory unlocked 3g stay unlocked after an update? at the iPhone 3G - Hackint0sh.org; I bought an iPhone from someone in Holland who bought it with contract from T-Mobile. ...
  1. #11
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    I bought an iPhone from someone in Holland who bought it with contract from T-Mobile. He then called T-Mobile to ask if they could unlock it, and they did. It costed him €120,- and the phone is simlockfree now.
    I can restore it, update it, whatever i want, it will always be simlockfree. This means itunes unlocks it everytime i restore it or whatever i do based on the information it sends to the apple servers, and i guess it's a combination of serial and imei or something.
    T-Mobile did not replace any hardware to make it simlockfree, and hardware is for every iPhone the same so it's only in a database for EVERY iPhone to allow other sim's or not....


  2. #12
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    I can confirm that the official unlock iPhone is not a hardware one.

    I have an official unlock iPhone. After I upgraded to firmware 2.2, it suddenly became locked with iTunes connect screen.

    After I plug the iPhone to iTunes, it connected to Apple site and return with a congratulation screen telling me that my iPhone is successfully unlocked.

    It should be a combination of IMEI and serial number and others
    .
    .
    .
    Touch Dial is an easy-to-use application for one touch dial / sms icon on the home screen for iPhone.

    This app can read the accelerometer and do phone dial or SMS dial for the same number based on the your setting for Portrait or Landscape Mode of iPhone.


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    Quote Originally Posted by javacom View Post
    I have an official unlock iPhone. After I upgraded to firmware 2.2, it suddenly became locked with iTunes connect screen.
    My officially unlocked iPhone didn't do that. Mine just updated, restarted and worked without any issues at all.

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    Quote Originally Posted by Passenger Bob View Post
    even if it was true what you described this is not baseband unlock but temporary authorization to use other carrier sim card in hardware sim locked iphone. SIm locked iphone remains hardware sim locked for its life and without hardware modification it is not possible to sim unlock iphone permanently.
    Good night
    1. hardware locked and unlocked is just plain stupid, defeats the point of mass manufacturing blueprint
    2. hardware locked will never ever be able to "temp authorized" using software means, you actually got something right, but that also means you cant update it, which brings to next...
    3. programmable logic, ever heard of it? it is all software coded
    Last edited by theclueless; 11-26-2008 at 06:22 AM.

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    Quote Originally Posted by kmpowell View Post
    My officially unlocked iPhone didn't do that. Mine just updated, restarted and worked without any issues at all.

    There are two things that I did which might have different behavior
    (1) My iPhone 3G is a refurbished one which has a US model mumber, the original unit is a HK model
    (2) After upgrade in iTunes, I unplug it while iPhone wais rebooting. After playing it for a while, it was locked and forced me to iTunes to unlock
    Touch Dial is an easy-to-use application for one touch dial / sms icon on the home screen for iPhone.

    This app can read the accelerometer and do phone dial or SMS dial for the same number based on the your setting for Portrait or Landscape Mode of iPhone.



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    Quote Originally Posted by Shade.sh View Post
    Thats not true, sorry. In germany we have locked T-Mobile phones, for some time you can obtain them unlocked, they send the IMEI to apple and after a iTunes sync the phones where unlocked. So its all a matter of Apples database, every iPhone can unlocked by his NCK code / token. All phones the same, no differences in hardware or baseband, they only have different IMEI's, NOR ID's and Serials.
    He is actually right.
    Without hardware modification, it is not possible to have a natively/permanently unlocked phone.
    Every time you restore, the phone needs to run a check to determine whether to accept one specific carrier or all carriers.
    That's why he said "temporary authorization".
    In his eyes, a true SIM unlocked phone would be one that has been hardware modified so that the check will not run and you won't need to contact Apple's server in order for it to accept all carriers.
    Of course, he is right doesn't mean you're wrong; it's just you guys are talking about different things.

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    Thanks everyone for your response,
    I ended up buying a "factory unlocked" iPhone and it arrived from Europe today. i am examining it right now...

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    Ok, so i took it apart and compared the motherboard and all other hardware and it looks to be the same as the locked at&t iPhones. So i would agree with the guy who said there is no hardware difference.

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    This part i dont understand,
    I put the phone into DFU mode and restored it using the same firmware (2.1) and the phone remained unlocked.

    Is it because the baseband was not updated?

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    Ok, so i updated to 2.2 and it was still unlocked before connecting to itunes


 

 
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