Changing SIM Cards make iphone 4 go to DFU Mode

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Larryj357, Jan 14, 2011.

  1. Larryj357 macrumors newbie

    Jan 14, 2011
    I purchased an unlocked phone from the UK. I cracked the screen and got it replaced. It seems as if I was given a refurb. I didn't complain because it was on Ios 4.1 and that allowed me to jailbreak.

    However I am now traveling in Africa and want to swap SIM cards. I haven't had to swap since when I got the phone from the UK. I instantly put a Norwegian SIM card and it worked. Now when I put in the african sim card it goes to DFU mode with the usb and the disc. If I take the sim card out and put the original sim in it works fine. Since I have done that now when I go to Itunes it says it can't recognize the content on my phone and I can't back it up.

    Is a restore in order and if I restore will it revert back to it's factory unlocked condition? Has anyone seen anything like this?
  2. eastercat macrumors 68040


    Mar 3, 2008
    DFU-black screen
    Recovery-USB cable and connect to itunes message

    Factory unlocked always stays unlocked--no matter what iOS you are on. Restore won't hurt a factory unlock.

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