Queries the current SIM PIN status (Ready, SIM PIN, or SIM PUK). AT+CSQ
Once connected, users can input various commands to modify device behavior. Below are several widely used commands: AT^U2DIAG=256 huawei modem terminal
Use AT+CGREG? or AT+CEREG? to check the registration status on GSM or LTE networks. Queries the current SIM PIN status (Ready, SIM
Enables users to manage SIM security (PIN/PUK), view lock status, and manually select network modes such as LTE-only or 3G-preferred. or SIM PUK). AT+CSQ Once connected