Hello,
I was required to build a banking application. I wanted to add SMS functionality to it in case there is a missed call. An SMS message is sent to the phone number of the missed call with details regarding the credit. I solved the case with Oracle database and an SMS gateway, called Ozeki. In case you also would like to build a similar solution and add SMS messaging to Oracle then this is a good place to start:
http://www.ozekisms.com/index.php?owpn=166 - How to send SMS messages from Oracle. I hope this solution will be useful for you.