ME310G1/ME910G1/ML865G1 AT Commands Reference Guide
80617ST10991A Rev. 11 Page 438 of 1039 2021-09-23
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.
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