I have an iphone 5s 64gb running iOS 7.0.4 Purchased my phone about 2 1/2 weeks ago. Purchased on a Monday around 7:30pm , on Tuesday around the same time, almost exact i lost all contacts, waited about 30 minutes or so to see if they would reappear and nothing. Had to restore previous backup. Next day, Wednesday same exact time it seemed, happened again, had to restore from backup. I said if it happened again I was going to return the phone. It didn't happen on Thursday. Since then, almost everyday if not everyday, atleast once, always at night sometimes during the day I lose contacts, i flip back and forth to my favorites and contacts they reappear randomly. Example; I realize my names are missing I go to favorites, nothing but numbers show up i flip to recent or contacts, back to favorites some names appear I do this a couple times they start to show back up eventually after about 10 minutes they all come back Except new contacts I add. It's like if I add someone that day or something there name doesn't come back. Any help? I upgraded from a 4s I have 1,034 contacts and over a million text messages (not joking).