Samsung Galaxy Note II User Manual page 132

4. Touch and drag the horizontal limit line up or down on
the graph to adjust the mobile data usage limit level.
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Viewing data usage by app or process
1. From the Connections screen, under Network
connections, tap Data usage. The Data usage screen
displays.
2. Scroll down the page to see the top three processes or
apps using mobile data service. Tap a process or app
to see data usage for the process or app, and to
configure specific settings.