Quectel MC60 Send SMS get response +CMS ERROR:69

IoT Modules GSM Module
1

With Quectel MC60 While sending SMS get a response
For Airtel (India)
+CMS ERROR:29
For Vodafone (India)
+CMS ERROR:69

CMS ERROR
CMS ERROR820×424 16.7 KB

I have completely restored the firmware but still same problem. Call and GNSS working well.

2

Hi Karthick:
1.Please check the following AT commands and send the response to us. Thanks.
AT+CPMS?
AT+CSMP?
AT+CNMI?
2.Please confirm whether the SMS service center address is correct or not?(excute AT+CSCA? to check)

3

For CME error 69, resolved this using AT+CGSMS=1.
The software changed this from 1 to 0 and did not change back even after changing the configuration in the UI.

1 = use circuit switching, 0 = use packet domain.

You can check which one is currently active by using AT+CGSMS?