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Discuss Use any Cingular Sim Card? at the General - Hackint0sh.org; According to McLaughlin (The guy from the UK) ,there are at least two steps to ...
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    Default Use any Cingular Sim Card?

    According to McLaughlin (The guy from the UK) ,there are at least two steps to unlocking the Apple iPhone, . His colleagues have been able to unlock the activation process to the AT&T SIM card specific to an Apple iPhone. This means that another AT&T SIM card can work with the phone and be activated through iTunes.

    Would anybody know how to do this? I want to simply use my current Cingular Sim card w/o having to sign up again with Cingular.

    I understrand that John's method will not let me use ANY sim card even a cingular card! Please correct me if I'm wrong!



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    McLaughlin is a retard.. you can use any AT&T 3g sim card out of the box.. There is no sim card specific to the iphone.

    There is *currently* no way for you to keep your current at&t/cingular plan with the iphone.

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    Quote Originally Posted by bugout View Post
    McLaughlin is a retard.. you can use any AT&T 3g sim card out of the box.. There is no sim card specific to the iphone.

    There is *currently* no way for you to keep your current at&t/cingular plan with the iphone.
    The way I'm reading this.... thats not entirely true...

    While **ANY** AT&T sim can be used in the iTunes 'activation process' the story doesn't end there...

    All of the below examples assume normal AT&T sims or AT&T iPhone sims...

    - Any iPhone SIM can be put into any **other** iPhone and it will be able to utilize the AT&T phone functions.

    - Any iPhone SIM can be put into any **other** cell phone and it will still be able to utilize it's AT&T phone functions.

    - Any non-iPhone SIM (we're talking AT&T ) that was NOT 'authorized' via iTunes can be put into any iPhone **but** IT WILL NOT be able to utilize it's AT&T phone functions - tho the iPod & wifi will continue to operate - just no dialing...

    It would seem that some 'code' is written TO the sim when its activated via iTunes and unless that 'special code' is found the iPhone will not function. So for example my wife and I both have AT&T... I have an iPhone and she has a SLVR... I can take my iPhone sim and put it in the slvr and it will operate but if I take the SLVR sim and put it into the iPhone ... I will not be able to dial...

    This is what I've been led to believe... if it's not correct PLEASE chime in...

    Dave

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    Quote Originally Posted by DaveGee View Post

    - Any iPhone SIM can be put into any **other** iPhone and it will be able to utilize the AT&T phone functions.
    Not true. an activated iphone sim put in another iphone requires you to activate again.

    It's already been established that the IMSI is being written to the iphone.. thats all.

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    How about with John's method? Can I activate the phone via John's method for feature usage (no phone) and then use my current Cingular sim for phone usage?
    I'm trying to keep my current cingular account w/o out even having to sign up for prepaid.

    Maybe I can sign up for prepaid and activate it. Then swap the sims..


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    Quote Originally Posted by bugout View Post
    Not true. an activated iphone sim put in another iphone requires you to activate again.

    It's already been established that the IMSI is being written to the iphone.. thats all.
    Ah... Okay, good to know. The wiki led me to believe that iPhone sim to another iPhone would work... that should be made more clear. I'll post a reference when I can.

    Dave

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    Quote Originally Posted by bugout View Post
    It's already been established that the IMSI is being written to the iphone.. thats all.
    Isn't that the case with all SIMs?

    link

    International Mobile Subscriber Identity (IMSI) Number

    The IMSI is a unique non-dialable number allocated to each mobile subscriber in the GSM system that identifies the subscriber and his or her subscription within the GSM network. The IMSI resides in the Subscriber Identity Module (SIM), which is transportable across Mobile Station Equipment (MSE). The IMSI is made up of three parts (1) the mobile country code (MCC) consisting of three digits, (2) the Mobile Network Code (MNC) consisting of two digits, and (3) the Mobile Subscriber Identity Number (MSIN) with up to 10 digits.
    After re-reading... Did you mean the IMSI that is assigned and written to the SIM (of the iPhone) is actually/also recorded into the iPhone itself (not simply its sim) and when it finds an unrecognized sim (imsi) it rejects it? Why would they do that? Its awfully annoying when you tend to swap phones or just hate to think you are specifically being prevented from doing so... I hate that! :lol:

    Dave
    Last edited by DaveGee; 07-07-2007 at 02:40 AM.

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    Quote Originally Posted by fellow026 View Post
    Maybe I can sign up for prepaid and activate it. Then swap the sims..
    No you can't.. Jon's method only activates.. you currently need and itunes activated sim to use the phone features..

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    Quote Originally Posted by DaveGee View Post
    After re-reading... Did you mean the IMSI that is assigned and written to the SIM (of the iPhone) is actually/also recorded into the iPhone itself (not simply its sim) and when it finds an unrecognized sim (imsi) it rejects it? Why would they do that?

    Dave
    Thats exactly what they're doing.

    Why? Because Apple gets a cut of the AT&T monthlies on iphones.. $$

    The upside is you can take an iphone activated sim and use it any unlocked phone.. apple still gets a cut.

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    The iPhone seems to 'marry' itself to the SIM card such that you can't simply trade them out.

    Thanks to the activation server, hopefully shouldn't be an issue though at all. The iPhone will ask to activate, you'll do so, and you're done. Theoretically this should allow use of any SIM in an iPhone which would at least give a small subsection (AT&Tingular business users) the ability to use their accounts with the iPhone. I'll test this. Not like Cingular has any recourse either. If unlocking a phone to work with a different carrier's SIM isn't illegal, 'unmarrying' to work with a SIM from the *same carrier* sure won't be!


 

 
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