IPhone 4S deleting contacts?

I've had two 4S iPhones for over a year now (first one fell and broke and I replaced it with a brand new one).

With each of these phones, about every month or so, it goes through a period where it will delete contacts entirely out of my phone book. Sometimes it'll compulsively delete only the most recently added 4-5 contacts, other times it just chooses randomly. If I don't have text messages from these people saved in my inbox, I lose their numbers entirely.

The OS doesn't seem to affect this issue - it's been consistent through 3 different software updates at this point.

No idea what to do! I have all my info backed up to iCloud, which backs up daily, but that also doesn't seem to make a difference in saving my contacts.

Any ideas?

  • Why is my iPhone randomly deleting my contacts? I have an iPhone 4S. Sometimes, my phone will randomly delete my contacts and it's so annoying. I'll go to my recent calls and texts, and the numbers will still show up. It's just the names that are missing. When I go to my list of contacts, it's empty. What's going on and how can I stop this? It's happened like 4 times already and it's getting annoying. I've only had my iPhone since October, so why is it doing this?
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