title: To change the bundle identifier of the my ios application
body: <p>I am new in IOS development. I want to change the bundle identifier of my IOS project.</p>
  
  <p>I have tried few things but it gives me errors.
  I want a complete guide to change the bundle id successfully.
  when I try to upload the application to app-store to get error
  The Bundle ID you entered has already been used.</p>