RM520N - Unexpected output from AT+QSPN command

IoT Modules 5G Module
1

Hi,
We are experiencing a very strange issue with this AT command, sometimes when we execute it it takes time for a response and then we get back the following output: +CIEV: 1,4
We looked online and didn’t find information about it…

2

hi，
What AT command was entered to return the following value?

3

@AnnaLiu the AT command that were entered is:
AT+QSPN

4

hi，
I tested it locally and this at command can be used normally.
[2024-01-03_15:18:19:632]AT+QSPN=?

[2024-01-03_15:18:19:632]OK
[2024-01-03_15:18:23:232]AT+QSPN

[2024-01-03_15:18:23:232]+QSPN: “CHINA MOBILE”,“CMCC”,“CMCC”,0,“46000”
[2024-01-03_15:18:23:232]
[2024-01-03_15:18:23:232]OK
Please retest and provide the at command process
Please provide your version information。
thanks.