I have recently downloaded the new software on my iphone, iOS 6. My mother and my sister also use my Apple ID to download their apps too.
Today my mother downloaded iOS 6 and all of my contacts were transfered to her iPhone. I would like to know how to remove my contacts from her device. I already tried logging out of my Apple ID from her device but all my contacts are still on her device.
Sharing a single Apple Id can save you money when downloading apps or music, but can cause confusion when attempting to use other Apple services associated with your Apple Id. In this particular instance I would venture your contact showed up on your mom's phone because she signed into iCloud with your Apple Id. By default iCloud syncs a lot of information:
If you go to Settings > iCloud you can toggle these services to on or off. Unfortunately, what I don't know is if toggling contacts off will remove the already synced contacts.
About a year ago I asked the question: how many Apple IDs should one household have? This spawned a lot of great answers and I definitely recommend reading it. To summarize it's okay to use the one account for purchases, but I would recommend having additional accounts for iCloud, Facetime etc.
There is a workaround that involves creating fake exchange account but I would recommend just setup them their own apple IDs (it's free anyway), restore while registering with iCloud with their IDs and use you ID for App Store if you must to.
Go into your iCloud on the computer, log in with the Apple ID, and go into settings. Remove the unwanted phone (phone B) from the iCloud. At the bottom, select restore contacts, and select a backup that is dated before the date of the merge. Create a separate Apple ID for phone B, sign out of iCloud from it's settings and sign in from a the newly created one. The contacts on phone A will be restored to the ones prior to the merge, so delete the unwanted contacts manually from phone B and back those up to the new iCloud. Issue resolved.
