this SIM5218 AT command manual - Cooking Hacks

SIM5218 Serial AT Command Set
0 – TA buffer of unsolicited result codes defined within this command is flushed to the TE
when 1 to 3 is entered (OK response shall be given before flushing the codes).
1 – TA buffer of unsolicited result codes defined within this command is cleared when
1 to 3 is entered.
Examples
AT+CNMI
+CNMI: 0,0,0,0,0
OK
AT+CNMI=
+CNMI: (0,1,2),(0,1,2,3),(0,2),(0,1,2),(0,1)
OK
AT+CNMI=2,1 (unsolicited result codes after received messages.)
OK
6.10 AT+CMGL List SMS messages from preferred store
Description
The command returns messages with status value from message storage to the TE.
If the status of the message is 'received unread', the status in the storage changes to 'received read'.
SIM PIN References
YES 3GPP TS 27.005
Syntax
Test Command
AT+CMGL=
Write Command
AT+CMGL=
Responses
+CMGL: (list of supported s)
OK
Responses
If text mode (AT+CMGF=1), command successful and SMS-S
UBMITs and/or SMS-DELIVERs:
+CMGL:,,/,[],[][,/,] [
+CMGL:,,/,[],[][,/,][...]]
OK
If text mode (AT+CMGF=1), command successful and SMS-
STATUS-REPORTs:
+CMGL:,,,,[],[],,,