Thank you.
It seems that your MVC300 already have latest firmware version from particular branch (meant to be used specifically as a dash cam camera, without additional (unnecessary for this use case) functionality). Therefore there is no firmware to update to, keeping similar device behavior in the process.
If time synchronization is crucial aspect for you, you can try to use one of below firmware downloads, just take note that these firmware downloads were meant for different solutions. Therefore, with new firmware version, you might experience different MVC300 behavior.
- Latest MVCxxx firmware as a standalone camera:
https://kaunas.teltonika.lt:444/f/a5c07e2c20084df7acef/?dl=1
- Latest MVCxxx firmware to be used with RUT955 device:
https://kaunas.teltonika.lt:444/f/f9b53fdc6e704078b140/?dl=1
- Your current MVC300_T_00.01.320 firmware version, just in case you will decide to "roll back to current firmware version":
https://kaunas.teltonika.lt:444/f/4e36b7b8332b4246a4fd/?dl=1
To avoid any issue during firmware upgrade, it is recommended to use private/incognito web browser's window and not keep any previous MVC300 settings.