I gave my old iPhone 4 to my sister when I upgraded to an iPhone 5. Everything went great until today when I opened Address Book on my Mac (OS X 10.7.5) and did a sync with my Google contacts. The Sync menu bar popped up and started syncing - but it synced with my sister's iPhone too! Now we both have each other's contacts in our address books. So how can I remove her phone to prevent it from syncing through the Address Book sync? Any ideas?
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