Flashing EM7455 and Network error

Hi,

We flashed EM7454modems to Generic version 38. We use Linux ubuntu 22.04 version. Every time we receive a message: Network error: reason unknown. What we can do? Could it be that modems are locked? Some of these modems has CE mark and some of them does not. Does it make any difference?

What are the return of the followings?



Ati3
AT!ENTERCND="A710"
at!IMPREF?
AT!PCINFO?
AT+CFUN?
AT!UIMS?
AT+CPIN?
at+cgdcont?
AT!GSTATUS?
AT!BAND?
AT!SELRAT?
At!usbcomp?
at!usbcomp=?