failed to upload *.app

Developing with Xcode is not all gold, sometimes you get diarrhea.
Like “failed to upload *.app” to your iPhone device for debug.
Solution is to restart your Xcode.
dont bother disconnecting and reconnecting your iPhone.
If still same error
then check if you are misusing .plist file, just try bringing it back to stock.
Delete app manually and try clean and build.