GL-x750c4 Sim Not Registered

I have a GL-x750c4 I recently had to unplug to move to a better location. Now when I plug it back up it tells me my SIM is not registered. Nothing has changed with the modem. Can someone please help.

still having trouble with this modem does anybody having any ideas that can help me with this problem??

Maybe there is no corresponding band coverage in the new place.
Which carrier do you use?