To control the data usage of individual applications
1Drag the status bar downwards, then tap 
.
2Find and tap Data usage.
3Find and tap the desired application.
4Mark the Restrict background data checkbox.
5To access more specific settings for the application (if available), tap View app settings and make the desired changes.
The performance of individual applications may be affected if you change the related data usage settings.
To view data transferred via Wi-Fi®
1From the Home screen, tap the Application screen icon.
2Find and tap Settings > Data usage.
3Tap 
, then mark the Show
4Tap the
Mobile network settings
Your device automatically switches between mobile networks depending on what mobile networks are available in different areas. You can also manually set your device to use a particular mobile network mode, for example, WCDMA or GSM.
To select a network mode
1From your Home screen, tap 
.
2Find and tap Settings > More… > Mobile networks.
3Tap Network Mode.
4Select a network mode.
To select another network manually
1From the Home screen, tap 
.
2Find and tap Settings > More… > Mobile networks > Service providers.
3Tap Search mode > Manual.
4Select a network.
If you select a network manually, your device will not search for other networks, even if you move out of range of the manually selected network.
To activate automatic network selection
1Drag the status bar downwards, then tap 
.
2Find and tap More… > Mobile networks > Service providers.
3Tap Search mode > Automatic.
Data roaming
Some network operators allow you to send and receive mobile data when you are roaming outside of your home network. It's recommended to check the relevant data transmission rates in advance.
To activate data roaming
1From the Home screen, tap the Application screen icon.
2Find and tap Settings > More… > Mobile networks.
3Mark the Data roaming checkbox.
You can’t activate data roaming when data connections have been deactivated.
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