How do I perform an "auto" sync?

With automatic syncing enabled, your contacts will be synced in the background while your iPhone is idle or while you are using other apps. 

To enable auto sync, go to Contacts Sync > Sync, select "Auto," and choose from one of the following sync types:

• Off: Disables automatic syncing
• 2-Way Sync: Syncs changes in both directions
• 1-Way Sync (e.g. Google Contacts -> iPhone): Syncs changes in one direction only, such as from Google to iPhone only

For best results, you can enable "Location Assisted Sync" so that your iPhone can auto sync your contacts whenever you visit a new location.  See this article for info:
https://playaapps.zendesk.com/hc/en-us/articles/360022975233-Location-Assisted-Sync

You can review past automatic syncs by going to Contacts Sync > More > Sync History.

Read about the other auto sync settings at: https://playaapps.zendesk.com/hc/en-us/articles/226334207-Auto-Sync-Settings

For help troubleshooting auto sync, please see this article:
https://playaapps.zendesk.com/hc/articles/226494667

This help article relates to the iPhone app called "Contacts Sync" which can be downloaded here:
https://apps.apple.com/us/app/contacts-sync-for-google-gmail/id454390333
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