Hi!
Looking for an utility to read messages from my SonyEricsson K300i (supplied application can only read phonebook, but no messages) I've tested your application. I like it because it doesn't need Outlook express or Outlook, as some phone suites need. It is very, very simple, instead.
But, to my surprise, it has been unable reading SMSs from my phone. After looking in an AT command sheet reference and some testing with hyperterminal, I've discovered the reason.
Some phones, such as mine, use numbers instead of strings as argument to 'AT+CMGL'. You can make a test for these phones issuing an 'AT+CMGL=?' before obtaining the messages. You'll obtain something like 'AT+CMGL=(1-4)' instead of the standard 'AT+CMGL="REC UNREAD","REC READ","STO UNSENT","STO SENT","ALL"'
Hum... maybe you need more info?
If you want me to put some samples, please send me a private message.