I am writing an app that must respond to certain text messages sent from a list people people who have permission to trigger the app. The app must be able to read the messages and interpret if they have the correct "passcode" and do the action that is requested in the text. The app will be running in the foreground at all times. I am developing this for OS3.1.3. I have developed apps for the appstore but have never ventured beyond that. I would like to use xcode and not mess around with the toolchain if I don't have to. I have been reading these forums and other resources to try an understand how I could best implement this on an enterprise type application or an app for a jailbroken phone. I have come up with a few ideas and would like some input: I could hook into the SMS notifications using CKSMSservice.h but I think this would require a jailbroken device with mobilesubstrate to write hook methods. Right? I could ping the sms.db periodically (once a second) since processor consumption is not really an issue. Is this possible? I read somewhere on this forum that kCTMessageRecievedNotification does not work anymore in 3.0 but I was wondering if there was any example code for 3.0 that would be similar to what I am trying to accomplish. Also are there any other resources that might help me figure out what would be the best way to implement my solution I would like it to be all in one app since it can run in the foreground 24/7 for this application. Thanks in advance!