Toggle on the services you want (Gmail, Calendar, Contacts, etc.). On iPhone (iOS)
Enabling Google Sync is the single easiest way to stop managing your technology and start letting it manage your schedule for you. Set it once, forget it, and enjoy the harmony.
Ensure "Auto-sync data" isn't turned off in your phone's battery-saver mode. Enable Google Sync On Gmail Account
If your emails aren’t showing up, check these three things:
If your Google Drive is 100% full, syncing often stops. Toggle on the services you want (Gmail, Calendar,
Think of Google Sync as the invisible thread connecting your devices. When it’s on:
Lose your phone? Your contacts and calendar are safely backed up in the cloud. and it’s marked as read everywhere.
Read an email on your tablet, and it’s marked as read everywhere.