Data Usage
Monitor how your data is being used, and set limits and restrictions to conserve it.
1.From a Home screen, tap 
Apps > 
Settings.2.Tap Data usage for options:Data usage cycle: Tap the drop-down menu, and then choose a time period for data usage. Data usage for the period displays on the graph, along with usage by application below.
By application: View data usage by application.3.Tap More for the following option:•Restrict networks: Select Wi-Fi networks that are mobile hotspots. You can restrict apps from using these networks, and you can configure apps to warn you before using these networks for large downloads.
