All my contacts were on my phone yesterday. Today I noticed that all my contacts were gone, but in the recent calls, it was replaced by their phone numbers. My notes are also gone. I haven't synced my phone for a few days, and it hadn't crashed or anything, so is there a way I could get them back? I tried to sync it, hoping it was backed up, but that didn't help. It was weird how it just disappeared out of nowhere. I haven't tried to turn it off than back on, afraid that everything on my phone would be lost.
Added (1). This happened the day I was notified that I could update to iOS 7.0.3. Maybe that could be the reason my contacts disappeared?
Read more: IPhone contacts disappeared. How do I get it back?