Hello Currently i have got PJSIP working on my iPhone app. I build using XCode 3.2.6 and SDK 4.3. Everything works fine on a device that runs iOS 4.3.3. However my app does not install on a device that runs on 4.2.1. I think the issue is with the build configs of PJSIP which uses the latest iPhone SDK. I have two questions: 1- Is it possible to build the app on an older SDK in order to support iPhones that run on a version earlier than my XCode SDK, say 4.0? 2- If not does that mean the i will never be able to support iPhones earlier than the SDK i have installed? Cheers Fadi -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111212/42233a96/attachment.html>