AT+QIDNSCFG=1,“8.8.8.8”,“8.8.4.4”*
I get the following response:
AT+QIDNSCFG=1,“8.8.8.8”,“8.8.4.4”*
OK
When I run AT+QIDNSCFG=?, I get the following response:
+QIDNSCFG: (1-16),,
OK
With few exceptions, a command ending in “=?” is the test syntax. This shows whether a command is implemented (returns “ERROR” if not), and what the range of permissible values is for supported commands.
In your case, the context range is 1 through 16.
Drop the “=” from the command for the read syntax. This should show the current setting.