In priority order:
1. Sometime in the last two days my iPhone 4S, with IOS 7.0.4, lost all my Calendar data except birthdays from Contacts.
2. Most of my Notes are lost except those from PC.
WRT the above, iPad data is still intact.
3. IOS 7.0.4 crashes apps A LOT! Even Apple apps.
4. IOS 7.0.4 is slow.
Resolved items 1 & 2 by rebooting the phone. I am happy that it resolved, but it shouldn't have happened n the first place.
Retrieving data ...