Note: When the SIM card is inserted correctly, the necessary settings will automatically configure and establish a connection. Otherwise, check if it is inserted correctly, or you can try to set up the APN settings manually.
1. With your device connected to your modem, access the router web interface.
2. Once logged in, click Settings
3. Go to Network, then select APN. Click Add.
4. Enter the following details:
Name: (leave it blank)
username: (leave it blank)
password: (leave it blank)
PDP Roaming: None
Save to apply the settings.