Iphone suddenly will accept other SIM

Discussion in 'Jailbreaks and iOS Hacks' started by sycohen, Jan 12, 2008.

  1. sycohen macrumors newbie

    Jan 12, 2008
    Melville, NY
    I've had my IPhone since mid-November. Early-on when it was running 1.1.1 I went thru the whole Jailbreak routine and was able to use the SIM from my pay-as-you-go Sony-Ericcson T68i without any problem. Then I, foolishly, upgraded to 1.1.2 and the applications and the ability to use the Cingular SIM went away.

    I tried several times to downgrade to 1.1.1, but it never worked. The closest I got was to be able to load third party applications, but the the phone would not recognize any SIM. I finally did a total restore back to 1.1.2 and everything was back to "normal"

    Today, I saw the extensive procedure posted by iclarified.com and said, "what the heck", I'll give it another shot. I was all set to start, when I decided to look at baseline performance and swap SIM's between the IPhone and the T68i. The AT&T SIM worked in the T68i, as expected, but, amazingly, the Cingular SIM worked perfectly in the IPhone.

    This is one of the first things that I checked when I did the restoration back to 1.1.2. The Cingular SIM did not work at that time.

    Can anybody tell me what's going on here?

    After I posted this thread, I synched the IPhone with Itunes and everything worked fine, except, I tunes still thinks that the phone has has the AT&T phone number event though the Iphone itself shows the Cingular number - stranger and stranger.....

    Attached Files:

  2. Corvillus macrumors member

    Jan 12, 2008
    Cingular IS AT&T. As a result, Cingular SIM cards normally work fine on jailbroken iPhones. You aren't bypassing the SIM lock at all by having Cingular (in fact, if you remember last year's Macworld keynote, Cingular was the chosen carrier, not AT&T, it just happened to be that by the time the iPhone came out the rename completed).

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