I release my free app to appStore and it\'s version 1.0 , it is an Universal app.
free app
Universal app
Now I want to release version 1.1 to appStore , and I upgrade
You can't upgrade your app from universal to iphone/ipad only. During Validation time you will get a error.
Also you can see this document: https://developer.apple.com/library/ios/qa/qa1623/_index.html