How to Receive an SMS Through a GSM Modem

1. Check whether your modem supports SMS text mode by typing 'AT+CMGF=1' and pressing Enter. The modem should return 'OK'.
2. Enter the PIN code of your SIM card by typing 'AT+CPIN='1111'', where the 1111 is the PIN code.
3. Put the modem into SMS text mode by typing 'AT+CMGF=1' and pressing Enter.
4. Type 'AT+CMGL='ALL'' and press Enter. This command will list the received messages. For example:+CMGL: 1,'REC UNREAD','+11111111111',,'07/09/10,09:55:16+08'[Text of message 1]+CMGL: 2,'REC UNREAD','+11111111111',,'07/09/10,09:56:03+08'[Text of message 2]OKThe '+11111111111' is the phone number where the message came from. 'REC UNREAD' says that the message is unread. The date and time indicate when the message was received by the modem.