this SIM5218 AT command manual - Cooking Hacks

SIM5218 Serial AT Command Set
If PDU mode (AT+CMGF
=0):
AT+CMGWO=,
+CMS ERROR:
Defined values
Integer type; value in the range of location numbers supported by the associated memory and start
with zero.
Destination-Address, Address-Value field in string format; BCD numbers (or GSM 7 bit default
alphabet characters) are converted to characters of the currently selected TE character set, type of
address given by .
TP-Destination-Address, Type-of-Address octet in integer format. (when first character of is +
(IRA 43) default is 145, otherwise default is 129). The range of value is from 128 to 255.
Content of message.
Content of message.
Examples
AT+CMGWO="13012832788","ABCD"
+CMGWO: 1
OK
6.23 AT+CMGSEX Send message
Description
The command is used to send message from a TE to the network (SMS-SUBMIT).
SIM PIN References
YES 3GPP TS 27.005
Syntax
Test Command
AT+CMGSEX=
Write Command
Responses
OK
Responses
SIM5218_Serial _ATC_V1.36 115
5/15/2012