title: IPhone: changing signature on app update
body: <p>I need an answer to the following question:</p>
  
  <p>I want to develop an iOS app in two phases.</p>
  
  <p>1) The app doesn't need a defined app ID so I sign it with my general purpose developer signature</p>
  
  <p>2) I need to add to my app Push Notifications so I need to define a specifid app id and I have to sign the updated binary with a specific app signature.</p>
  
  <p>The question (may be naive):</p>
  
  <p>What happens to already installed old versions?
  They will update normally dispite of different signature?</p>
  
  <p>To be honest I think so since I think that the bundle id is what makes the difference and with a defined bundle id (that in phase 2 will be rhe same of app id) all the apps will be updated even if signed with different signatures.</p>
  
  <p>Can you confirm this?</p>
  
  <p>Thanks In Advance.</p>