I have an AirM2M_Air724UG_V301840_LTE_AT module with ^HVER: RDA8910. I’m encountering an error when attempting to send a USSD command. Here are the details of my current status:

AT+CREG? -> +CREG: 0,1 OK

AT+CSQ -> +CSQ: 26,99 OK

AT+CNMI? -> +CNMI: 2,2,0,0,0 OK

AT+CSCS="GSM" -> OK

AT+CMEE=2 -> OK

AT+COPS? -> +COPS: 0,1,"IranCell",7 OK

AT+CUSD? -> +CUSD: 0 OK

AT+CUSD=1 -> OK

AT+CUSD=1,"7332#",15 -> +CME ERROR: phone failure

AT+CMGF=1 -> OK

AT+COPS=3,1 -> OK

AT+CUSD=1,"7332#",15 -> +CME ERROR: phone failure

AT+CNMI=2,1,2,1,1 -> OK

AT+CUSD=1,"7332#",15 -> +CME ERROR: phone failure

AT+CUSD=1,"7332#",32 -> +CME ERROR: parameters are invalid

AT+CUSD=1,"7332#" -> +CME ERROR: phone failure

AT+CUSD=0,"7332#"-> +CME ERROR: phone failure

How can I fix this issue?

Additional Information:

I have a 2G module (Goouuu tech GA6) that works with this SIM card, so the SIM card is fine.
All other commands work; I can make calls, send and receive SMS, and connect to the network. The USSD command is the only one that fails.