I develop an application with XCode 4, and the SDK used for compilation is IOS 4.3.
Now I would like to use ios SDK 3 to supply my application for iPhone 3 users.
But I don't find where download ios SDK 3.0. On apple site (http://connect.apple.com/cgi-bin/WebObjects/MemberSite.woa/wo/5.1.17.2.1.3.3.1.0.1.1.0.3.9.3.3.1) I only see version 4.
Is there a reason why Apple don't allow ios SDK 3 download ?
Where can I find it ?