Sony Ericsson Z301i

at+cscs?
+CSCS: "GSM"

OK
at+cpms=?
+CPMS: ("ME","SM"),("ME","SM"),("ME","SM")

OK
at+cscs=?
+CSCS: ("GSM","IRA","8859-1","UTF-8","UCS2")

OK
at+cscs="UCS2"
OK
at+cpms=?
+CPMS: ("004D0045","0053004D"),("004D0045","0053004D"),("004D0045","0053004D")

OK
at+cpms="ME"
ERROR