[Query] Onyx Boox C69 Custom Edition: Dumping firmware, cross-flashing, and more

[Bokasoda]

My sister-in-law got a couple of decommissioned Boox devices from her workplace and asked me to take a look at them. They feature a custom boot logo as well as a modified firmware with various bundled apps.

I managed to remotely dump the following info from one unit:

adb shell getprop ro.product.model
C69_M_STAR

adb shell getprop ro.product.device
C69_M_STAR

adb shell getprop ro.build.fingerprint
Onyx/C69_M_STAR/C69_M_STAR:11/2023-07-20_17-44_3.2.2-bridge_1d80e860a/5465:user/dev-keys

adb shell getprop ro.build.display.id
2023-07-20_17-44_3.2.2-bridge_1d80e860a

adb shell getprop ro.build.version.incremental
5465

It looks like the C69 platform is being rebranded by various vendors across the globe, as seen here. My SIL also confirmed that the physical appearance of the units does match with the one shown in the Reddit thread.

According to her, no OTA is available on the units, and a manual check reports that the current (customized) firmware is the latest one.

I tried to cross-flash the Boox Bering 5 firmware through the updater, but it failed as intended due to mismatched prop values.

I'm planning to go to her place in the weekends and borrow one unit to tinker with it. Meanwhile, what can be done remotely if we want to:

• Backup the existing firmware for preservation
• Cross-flash a newer, retail Boox firmware
• Root it to have more control

?

Tagging @Renate, since this seems to be her domain of interest.