[SOLVED] Sound not being recorded, setting resets to Off after reboot

[phd]

All recorded videos do not have sound.
After setting sound recording to On, it resets itself to Off after camera reboot.

I have 70mai 1S-4441 Midrive D06
Firmware version is 1.0.4.ww (70mai App says it's the latest).

Is there any new firmware I can install to fix this?
Any other ways?

I have read this thread on similar issue with other cam:

70MAI - Sound recording

Hello my friends! I need some help... I have an 70mai and to recording sound, i have to give a voice command or clicking in the camera do start recording sound. Is there any command to give order to record sound automatically? Boas meus caros amigos! Preciso de apoio... tenho uma 70mai e para...

dashcamtalk.com

but there is no more info nor link to that pro firmware

 

[phd]

I think I've managed to resolve this issue.
I downloaded firmware image with the same version I already had (MIDRIVE_D06_WW_1.0.4_26.11.2019_OTA.zip) [1]:
FW_DR0008.bin (MD5: f71e224422701cfe2f69de4e3a9c7e50) and forced the update using microSD card [2].
After flashing the firmware (which took about a minute) sound recording works fine and settings are no longer lost on reboot.

[1] https://dashcamtalk.com/forum/threa...ing-from-chinese-to-english.33253/post-501283
[2] https://dashcamtalk.com/forum/threa...ing-from-chinese-to-english.33253/post-504482