title: How do I install a development iPhone app on my phone for testing?
body: <p>I have an iPhone application built as an <code>.ipa</code> file. I also have my device registered on my Apple Developer Connection account. I downloaded the <code>.mobileprovision</code> and dragged both it and the <code>.ipa</code> into iTunes. The app shows up fine in iTunes. When I try to sync, though, I get</p>
  
  <blockquote>
    <p>The application "FUBAR" was not installed on the iPhone "My Phone" because the application signature is not valid.</p>
  </blockquote>
  
  <p>What am I missing?</p>