There are many reasons that can explain that your internet connec􀆟on is not working a􀅌er inser􀆟ng the SIM card. The first one can be that the SIM card is not inserted properly, please check the posi􀆟on of the SIM card by referring to the schema that shows the inser􀆟on procedure. 

CASE 1: Full Size SIM Card to Micro

CASE 2: Nano SIM Card to Micro SIM Card

 

Another reason can be that your SIM card is locked by a PIN. To unlock
it, you must connect to the Web UI and enter the PIN code. Please follow the
procedure described in the following section: How do I enter my SIM PIN code ?

Finally, it is also possible that your SIM card is detected but not
automatically recognized by the device. In this case you must connect to the
Web UI and check the APN settings of your service provider. This procedure is
explained in the following section: How do I check and edit the APN settings of
my service provider?