Actually, XCode 4.2 doesn’t support iOS 3.1.3 for simulator. But it can be used to deploy into iOS 3.1.3 device. I like to use XCode 4.2 to develop the code because it has better interface and ‘Interface Builder’ already built in there. Here is what i did :

Hey there! I was exciting with my jailbroken iPhone 3.1.3 and even more excited that I can develop on it. In this post i’ll share how to develop on it using XCode 3.2.1 (or XCode 4.2) without provisioning profile. This tutorial I combine from networkpx Project Blog and alexwhittemore blog as i couldn’t make it works by following full step ...