I have written some code that sends the appropriate AT Command and recieves a specified message from the phone. I then strip the response to the raw PDU data and decode it. My problem is that some of the messages are more than 1 message long, and i believe that the PDU decoding of any message that is part of a multple SMS fails.

How do multiple SMS work, and how can i discover which ones go together and then how to decode them to form the full message?

Kind Regards,