Hi
Trying to find out why this router keeps going offline. Connected via Sim card.
Finally able to log on to it and see the event log (see pictures) 

There seems to be a good signal (-51 dB) and 4G connection.
The event log keeps saying that the device is connected to the network operator. This message appears approx. every 7 seconds. But it never proceeds from there and never proceeds to the next step 'Joined 4G LTE' and assigning IP adresses on the LAN.
Is it the router antenna that is not right? Could it be the sim card? The reception in the area should be allright, because when it is online the network has a good speed.
Appreciate any help.