Warning: Before connecting to the Web UI, make sure that your SIM card is properly inserted and that the PIN is disabled or entered.
Once you are in the Web UI, you can notice that several statuses can be written next to the SIM card status line:
Case 2: The SIM Card is inserted properly and detected but there is no connection to the mobile network because the SIM is locked by a PIN Code or because you may need to wait for the network to be detected (if the network is not detected after waiting for a short time, please check the APN settings and enter the information for your service provider).