iPhone Cannot downgrade to iOS 9.3.5 firmware not compatible

Discussion in 'iOS 9' started by h4mza, Oct 8, 2016.

  1. h4mza macrumors 6502

    Jul 30, 2010
    Seeing Apple is still signing 9.3.5, I went and downloaded IPSW file from redmondpie website and then tried to restore with iTunes but it says firmware not compatible. Have I downloaded the wrong file? I have iPhone 5C, model A1507 which I believe is GSM so I downloaded the GSM file and it says firmware not compatible? What is wrong?
  2. C DM macrumors Westmere

    Oct 17, 2011
    Might be the wrong file. Might want to try another file or another site perhaps.

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