Today we wanted to put new Chateau 5G R16 into operation.
Like usually with every new device we upgrade them to the latest stable version.
In this case from v7.14 to 7.16.1
After the upgrade, Routerboard firmware was also upgraded to 7.16.1.
Then message pops up that Modem firmware is old.
New firmware was found RG520FEUEAR03A04M4G.
Standardly as we did with every Chateau ( lte6, 18ax, 5g, 5gax), we pressed upgrade firmware.
Device downloaded firmware and it said that fimware was upgraded 100%.
After upgrade Chateau restarts the device...
After restart - LTE device is inactive.
I tried restart of Chateau, power disconnect, factory reset.
Nothing works...

What to do next?