Close a network connection
If several apps are using an internet connection, you can use the Connection manager app to close some or all network connections.
Select 
> Settings and Connectivity > Connection manager .
In the active data connections view, you can see your current network connections. 
is a mobile data connection, and 
is a Wi-Fi connection.
Select and hold the connection, then select Disconnect.
Select the connection.
Details, such as the amount of transferred data and connection duration, are shown.
In most views, to see what connections are active, swipe down from the notification area.