problem with unlocked iphone 4

Discussion in 'Jailbreaks and iOS Hacks' started by dongwe, Aug 31, 2010.

  1. dongwe macrumors member

    Jul 30, 2010
    i unlocked my iphone4 with ultrasn0w, since i upgrated it from cydia at 1.1,
    sometimes when i switch off and then turn on it says "sim card not valid" so i have to restore network settings and it works...
    why sometimes it says sim card not valid? is there something i can do to solve this problems?
  2. shuyin1946 macrumors newbie

    Aug 24, 2010
    Happened to my iPhone 4 jailbreak as well. However when i bump to such situation i just switch on the airplane mode and off it to make sure the phone goes to searching for network. Hope Ultrasnow could fix it in future. Better still they made a brute force unlocking method.:(
  3. eastercat macrumors 68040


    Mar 3, 2008
    Unless you can hack into Apple's unlock server, we're stuck with the software unlock.


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