3.6.2. AT+CPMS - Preferred Message Storage
The command selects the memory storage used by SMs (Short Messages).
AT+CPMS=<memr>[,<memw>[,<mems>]]
Set command selects memory storages <memr>, <memw> and <mems>
to be used for reading, writing, sending and storing SMs
The command returns the memory storage status in the format:
+CPMS: <usedr>,<totalr>,<usedw>,<totalw>,<useds>,<totals>
The returned parameters are described in the Additional info section.
Parameters: