Unlock
By default the device is locked (no shell access, no external booting, store, adobe drm) and firmware updates need to be signed with BQ private key.
BQ provides instructions to install a
Developers edition firmware on
https://blog.bq.com/es/bq-ereaders-developers-program/.
Note 1: Bq pages went down, probably forever. Please use
http://web.archive.org/web/202007200...opers-program/ instead.
Note 2: In february 2021 firmware files hosted on amazon cloud are no longer available
Send me a private message and I can pass you a link to the file. Only available for
Cervantes 2013,
Cervantes 3 and
Cervantes 4.
You need to install Developers edition firmware to be able to install KOReader or other software. This means you'll lose the nubico store and adobe drm support.