SARA N211 Firmware clarifications

Dear Sodaq support team,

I have recently bought a NB-IoT Shield DeLuxe - Dual Band 8 & 20.
I would like to know whether the firmware shipped with the Sodaq nb-iot shield and the firmware we can find here is provided untouched from u-blox or there are some modification from Sodaq.
Is there a public place from u-blox where we can download the firmware? I would also like to know if a firmware downgrade is possible.


Waiting for the new firmware.
However now I can clarify why I asked for this: the firmware was performing suspicious scary things, but now they seem to be in part explained with the new documentation.