[knc1]

Originally Posted by evianluw

Yep.



Did you mean Kubrick in this thread https://www.mobileread.com/forums/sho...d.php?t=206064 I thought this would only work on k3, k4 and kt, not for kpw2.
Or you meant the factory images in this thread https://www.mobileread.com/forums/sho...d.php?t=275877 which doesn't seem already jailbroken.



After an update, if I need to jailbreak again or fixing jailbreak, I'll need to upload the bin file to my Kindle. But without jailbreak it's impossible to transfer files. This is a paradox.

Note the qualification: "for the devices it is intended to be used on".

You will not need to be concerned about updates on any series 5 firmware device, it is viral and will self-reinstall.
It is only the first time that transfering our signature certificate (a file) that seems to be a paradox - and it is that situation which we solve for EVERY model Kindle (except for the PW3-32, for which we are still waiting for an owner that will cooperate with us).
Until an owner is willing to cooperate with us, the PW3-32 isn't our problem.

The factory images we have posted are very easy to jail break, which of course is why we use them.

It is always possible to transfer files when you have access to the serial port.