Hi, when I try to run the following command: AT+CPMS="SM" (or any other memory) I get: cms error . Can anyone help me? Thanks

Question

AT+CPMS=?

+CPMS: (),(),()

AT+CPMS="SM"

ERROR

Answer 1

This is a case where using extended error reporting, AT+CMEE=2, very likely will give some hint on what the problem is rather than just "something went wrong", aka ERROR.

I strongly suspect the problem to be not giving both <mem1> and <mem2> values.