Samsung Galaxy J3 V / Galaxy J3 (3rd Gen.) - Perform a Gmail™ Sync
Frequent account syncing can reduce battery life.
From a Home screen, swipe up or down from the center of the display to access the apps screen. These instructions only apply to Standard mode and the default Home screen layout.
Navigate: Settings > Accounts > Accounts.
Select the appropriate Gmail address. Multiple accounts may appear.
Tap Sync account.
Select the appropriate data sync options (e.g., Sync Contacts, Sync Gmail, etc.) to turn on or off .