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Hi,

You should use another AT command to send USSD commands. Its AT+CUSD=1,<ussd_command>,15

 Unfortunately this command return OK to any command you send. After the operator response to command module get unsolicited message which you can't see using gsmctl.
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Thanks. returns Ok. How can I read the answer from the operator?
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are there any plans to implement USSD feature in the RUTX09 series?