Kindle Paperwhite 1 (EY21 / B01D), FW 5.6.1.1 - “Invalid Update File” when trying to

[chrber]

Hello everyone,

I’m trying to jailbreak an original Kindle Paperwhite 1 (2012).

Device information:

* Model: Kindle Paperwhite 1 (EY21)
* 3G model
* Serial prefix: B01D1501
* Firmware: 5.6.1.1 (2689890035)
* Never jailbroken
* Not registered to Amazon anymore (registration no longer possible)

What I tried:

1. Installed the WinterBreak files (apps, mesquito, themes, etc.).
2. The experimental browser can access Google, so Wi-Fi works.
3. However, it cannot open the WinterBreak2 page (page load error / likely TLS issue).
4. I then tried the legacy downgrade approach.
5. Copied the official update_kindle_5.4.4.bin (191.5 MB) to the Kindle root.
6. Also tried 5.4.4.2.
7. “Update Your Kindle” reports “Invalid Update File”.
8. Keeping USB connected and forcing a reboot (holding the power button for about 30 seconds) produces the same result: “Invalid Update File”, then the Kindle reboots back into firmware 5.6.1.1.

Questions:

* Is downgrading from 5.6.1.1 still possible on this exact hardware revision?
* Is there a different downgrade path for the EY21 / B01D 3G model?
* Is there another currently recommended jailbreak method for a never-jailbroken Paperwhite 1 running 5.6.1.1?

I’d appreciate any advice. Thank you very much!