📖
The Kindle Modding Guide
  • The Kindle Modding Guide (WIP)
  • Getting Started
    • How do I know what is my Kindle called?
    • Determining the method to use for jailbreaking
  • Jailbreak (Software)
    • KindleBreak (5.10.3-5.13.3*)
    • WatchThis (5.12.2.2/5.13.4-5.14.2)
    • LanguageBreak (5.14.3-5.16.2.1.1)
  • Jailbreak (Hardware)
    • Popcorn (KT2, KT3, PW2, PW3, KV)
  • Post Jailbreak
    • Set up a Hotfix
    • Installing KUAL/MRPI
    • (Optional) Disable OTA Updates on 5.11+
    • (Optional) KOReader
  • Miscellaneous
    • Updating your Kindle to a specific Firmware
    • Downgrading your Kindle Firmware
    • Forcing KV to run 5.14+
    • Helpful Resources
  • Contingency Plan
    • Back up your Kindle's system files (8th gen or older)
    • WIP: Unbrick a Kindle with your system backup using Serial (8th gen or older)
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On this page
  • Prerequisites:
  • How To Downgrade:
  • That's it, you've downgraded your Kindle! Note that you should factory reset, then flash that firmware once again to clear out things.
  1. Miscellaneous

Downgrading your Kindle Firmware

This page will guide you through how to downgrade your Kindle firmware with this KUAL extension.

PreviousUpdating your Kindle to a specific FirmwareNextForcing KV to run 5.14+

Last updated 1 year ago

Info taken from original thread:

Prerequisites:

  • A Jailbroken Kindle with KUAL installed.

  • .

  • KUAL extension.

  • Backed up data as well as your , as downgrading your Kindle can corrupt things.

How To Downgrade:

  1. Before you proceed, if you have , restore it now to prevent complications later.

  2. Install the Downgrader extension as you would any other KUAL extension.

    • Drag and drop the downgrader folder containing the bin, config.xml, menu.json into the extensions folder on your Kindle's visible storage's root.

  3. Launch KUAL, then Downgrader.

  4. Pick the device that you have, make sure it is the right device as this tool sets up the version.txt file to match that of the lowest denominator of the device, thus tricking the Kindle's updater to force an "upgrade".

  5. Once you've selected your device, your Kindle will restart, now with the lowest version possible spoofed in the system.

  6. Plug in your Kindle (making sure that USBNetwork is off and USBMS is on), then copy the update file you've downloaded earlier to the Kindle's visible storage root.

  7. DO NOT eject or unplug the USB cable, as this will make the Kindle's OS auto delete the update file we just copied to. Instead, hold the power button until your Kindle restarts. Now it should boot into the updater, and begins your firmware downgrade.

That's it, you've downgraded your Kindle! Note that you should factory reset, then flash that firmware once again to clear out things.

https://www.mobileread.com/forums/showthread.php?t=347165
Firmware version of your device that you desire
Downgrader
system files
disabled OTA updates