iPhone : Connect to iTunes to Use Push Notifications

It seems that this message is randomly appearing for quite some people. It did for me when I updated to the iOS 7.0.3.

There are several solutions available on the internet including:

Backup to iTunes Do factory reset Restore from Backup Re-install applications from appstore

Although this will probably work for everybody it is not the best of the solutions.

For me disabling iCloud Keychain was sufficient, hopefully it will be fixed soon.