LE910Cx AT Commands Reference Guide
80502ST10950A Rev. 14 Page 663 of 1904 2022-03-04
delete all read messages from selected storage, sent
and unsent mobile originated messages, leaving
unread messages untouched
delete all messages from selected storage.
If <delflag> is present and not set to 0 then, if <index> is greater
than 0, <index> is ignored and the command follows the rules for
<delflag> shown above.
In case of Verizon FW, delete an empty slot with specified <index>
will return +CMS ERROR: 321 or ERROR.
AT+CMGD=?
Test command shows the valid memory locations <index> and the
supported values of <delflag>.
AT+CMGD=?
+CMGD: (1,2,3,6,7,17,18,19,20,37,38,39,47),(0-4)
OK