What to do if Sierra Wireless Modem is receiving 'NO CARRIER'?
- JJames EatonJul 30, 2025
If your Sierra Wireless Modem displays 'NO CARRIER', several factors could be at play. Here's what you can check: * Ensure the semicolon (;) is entered immediately after the phone number in the AT command (e.g., ATD######;). * Verify that the selected bearer type is supported by the called party and the network. If issues persist, try setting the bearer type using the AT command: AT+CBST=0,0,3. * Configure your SIM card for data/fax calls, consulting your network provider if needed.