title: iPhone: Minimum OS, Deployment Target & Base/Active SDK
body: <p>I'm a little confused about building an app for the app store and for the correct SDK &amp; OS version. I have submitted my app to the app store, and in the app details screen of iTunes connection it says:</p>
  
  <p><strong>"Minimum OS Requirements : 3.1.2"</strong></p>
  
  <p>I haven't seen any apps on the app store that have 3.1.2 as the min OS, they all say 3.0. I read several things on here before I built it and I thought I understood everything!</p>
  
  <p>Basically, my app doesn't use any code that only exists in > 3.0 so I would like the minimum OS to be 3.0. My build settings were:</p>
  
  <p><strong>Target Info</strong></p>
  
  <ul>
  <li>Base SDK: iPhone Device 3.0</li>
  <li>iPhone OS Deployment Target: iPhone OS 3.0</li>
  </ul>
  
  <p><strong>Xcode Main Window</strong></p>
  
  <ul>
  <li>Active SDK: iPhone Device 3.1.2</li>
  </ul>
  
  <p>I've heard about a minimum OS version being put in the Info.plist but I haven't got anything like that in mine.</p>
  
  <p>I build the app exactly like that and submitted it. Are my app settings correct? Will my app display 3.0 in the app store or 3.1.2? I'm a little unsure as to why you set the Active SDK to the latest (3.1.2) when you want to target 3.0 , 3.1 &amp; 3.12 devices, but it's what I read!</p>
  
  <p>Any help advice be greatly appreciated!</p>