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Old 06-02-2023, 12:50 PM   #1
jma1
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Help with software downgrade PW4 (5.15.1.1)

I have a Kindle PW4 that recently auto-updated to software 5.15.1.1. If it is possible to jailbreak, install a prior version of software, and prevent auto-updates even while wifi connected, could someone point me to the correct procedures?

I just want to get back to a software version that supports the 'original' Periodical document format viewing and toolbar functionality.

Thanks in advance.
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Old 06-02-2023, 01:15 PM   #2
hartleyshc
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It's only possible if you have previously jailbroken your device. There's a thread in this sub forum describing the process.

If you haven't previously jailbroken your device, then you'll need to wait until a new exploit is discovered/developed into a usable solution.

Your best bet is to try and keep the device on this version by keeping it in airplane mode and transfer books via USB+PC. No internet means no pushed updates.
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Old 06-02-2023, 04:19 PM   #3
j.p.s
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No SW beak, but you can try the serial port (hardware, open case required)

https://www.mobileread.com/forums/sh...d.php?t=313438

It will be even more tricky because the way amazon stores the keys changed.
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