Currently Being ModeratedOct 31, 2012 8:37 AM (in response to jimmyfromjonesboro)
Don't use the same Apple ID and don't sync with the same iTunes.
Currently Being ModeratedOct 31, 2012 8:45 AM (in response to jimmyfromjonesboro)
Don't sync you contacts (or other data) with the same iCloud account. Use separate accounts or your data will be merged.
Currently Being ModeratedNov 3, 2012 2:48 PM (in response to randers4)
My wife has an iPhone 4S, I have an iPhone 4. We have separate iCloud accounts and separate Apple IDs. About a week ago, my contacts started appearing on her 4S (in addition to her's) but her contacts do not appear on my 4. I have had my phone for > 2 years; she has had hers for about 3 months. We have confirmed that each phone is signed in to the correct iCloud account.
Suggestions greatly appreciated.