Follow these tips when using Contacts Sync for the first time:
- Start by configuring the app to sync the desired accounts in the "Accounts" tab. Keep in mind that your iPhone contacts may be composed of several accounts, such as iCloud and Google and Outlook. By default, the app will sync Google with iCloud. Read more about how to configure your accounts at: https://playaapps.zendesk.com/hc/en-us/articles/226468868-How-To-Select-2-Accounts-to-Sync
- For best results, disable your Google contacts in your iPhone Settings, if you haven't done so already, as detailed here: https://playaapps.zendesk.com/hc/en-us/articles/226469468.
- Before syncing with Google for the first time, eliminate any duplicates by visiting https://contacts.google.com/suggestions
- If it's the initial sync, and you can treat either your Google or iPhone contacts as your "master" list, I would suggest using either the "Google Contacts -> iPhone" sync mode or the "iPhone Contacts -> Google" sync mode. Otherwise, perform a 2-way sync. After your first sync, I would generally recommend using a 2-way sync.
This help article relates to the iPhone app called "Contacts Sync" which can be downloaded here:
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