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Can you change the firmware on the model A1533 Iphone 5s from OS: 8.55.00 to 9.0.2

Can you change the firmware on the model A1533 Iphone 5s from OS: 8.55.00 to 9.0.2. I want to make it compatable with the Ford Sync system.

iPhone 5s, iOS 11.3.1

Posted on Jul 19, 2018 3:25 PM

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Posted on Jul 19, 2018 3:30 PM

No. It’s not possible to downgrade.


8.55.00 is a baseband version, not an iOS version; it corresponds to iOS 11.3 through 11.4.1.


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Can you change the firmware on the model A1533 Iphone 5s from OS: 8.55.00 to 9.0.2

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