[huronhorn]

Originally Posted by j.p.s

You are correct, that box has the serial number. That can not give you direct firmware version information.

But you can use it to get the manufacture date using the perl script in the thread
https://www.mobileread.com/forums/sh...d.php?t=338766
which is based on the information from the post
https://www.mobileread.com/forums/sh...20&postcount=5

This helps alot!
i try to check its manufacturing date and it shows:

Prefix: G000WL
Model: Kindle Oasis 3 (2019) WiFi (8GB)
Made: 20x0 Week 42 Day 7
Nicks: KOA3, KOA3W8
Notes: [Support added in KindleTool 1.7.0]

so i guess its around 23rd november 2020? and CMIIW as a rule of thumb, is kindle manufactured before march 2021 is likely to ship with jailbreakable FW? (this thread shows that KOA3 manufactured on march 2021 ship with 5.12.4 FW https://www.mobileread.com/forums/sh...=338440&page=2)

last thing, if kindle does ship with jailbreakable FW, can it be updated manually or OTA to desired FW? (lets say kindle does ship with FW 5.12.4, jailbroken it, and can it be specifically updated to 5.13.3 to retain jailbreak)

again, thank you so much for your help!