Galaxy Tab S2 - How do I Set the Automatic Date and Time on my Samsung Galaxy Tab S2?
You can set the automatic date and time to the network-provided time by going to Date and time in Settings.
You may need to restart your device for automatic mode to work correctly.
Change Notification Settings
From the Home screen, touch Apps > Settings > Date and time.
Touch slider next to Automatic date and time to turn it on.
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