1. iMore Question's Avatar
    I have an iphone 5s with ios 7.1.2 version . I'd like to upgrade this IOS version to 9.3.5 only (because I don't want to upgrade to 10.1.2 which is a mess with the battery of the iphone according to many user reviews)
    I downloaded the iPhone6,1_9.3.5_13G36_Restore.ipsw file, but I failed to install it with iTunes.

    So I ask if there's a free tool to install ipsw file directly on my 5s iphone without iTunes?
    03-07-2017 11:08 AM
  2. kch50428's Avatar
    No... Apple no longer signs the version you desire to install.
    03-07-2017 11:50 AM
  3. mark-d's Avatar
    Traditionally Apple only signs the version prior to the latest release for a day or two at most. In general they only sign the latest release of software.

    Obviously by latest release I mean latest release available for each specific handset
    03-07-2017 01:16 PM

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