Hi,
Try to disable automatic MBN selection.
If module can’t found commercial operator per SIM card, it automatically choose ROW (rest of the world) settings. These settings doesn’t works with us.
So, try:
at+qmbncfg=“Autosel”,0
at+qmbncfg=“deactivate”
Restart the modem, and check with command:
at+qmbncfg=“list”
that no one mbn is selected (have all with “,0,0”) data
In one case this help us, but it also can be many others reasons, like this one: