1. iMore Question's Avatar
    I tried all tutorials and used redsnow/snowbreze but I am unable to update my iPhone 4 to ios 7. the phone is sim-locked (don't use it for call, just for apps and games) and when I start itunes, they recognize it and tell me to enter a proper sim. so I cannot install downloaded ios 7 ipsw.

    and if I try to put iphone into itunes mode and then start itunes, they start upgrading but stops each time with error.

    I currently have ios 6.1.3 tethered.
    03-12-2014 12:51 PM
  2. iOS Gravity's Avatar
    Just enter a sim from the carrier its from. It doesn't need to have a plan on it.
    03-13-2014 07:30 PM

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