Learn how to control data usage on your Sony Xperia Z1. You can keep track of the amount of data transferred to and from your device over your mobile data or Wi-Fi connection during a given period. For example, you can view the amount of data used by individual applications. For data transferred over your mobile data connection, you can also set data usage warnings and limits to avoid additional charges.

Note: Adjusting data usage settings can help you keep greater control over data usage but cannot guarantee the prevention of additional charges.

To turn data traffic on or off

1. Drag the status bar downwards, then tap Settings icon .
2. Tap Data usage.
3. Drag the slider beside Mobile data traffic to turn data traffic on or off.

Note: When data traffic is turned off, your device can still establish Wi-Fi and Bluetooth connections.

To set a data usage warning

1. Make sure that data traffic is turned on.
2. Drag the status bar downwards, then tap Settings icon.
3. Find and tap Data usage.
4. To set the warning level, drag the warning line to the desired value. You receive a warning notification when the amount of data traffic approaches the level you set.

To set a data usage limit

1. Make sure that data traffic is turned on.
2. Drag the status bar downwards, then tap Settings icon .
3. Find and tap Data usage.
4. Mark the Set mobile data limit checkbox if it is not marked, then tap OK.
5. To set the data usage limit, drag the corresponding line to the desired value.

Note: Once your data usage reaches the set limit, data traffic on your device will be turned off automatically.

To control the data usage of individual applications

1. Drag the status bar downwards, then tap Settings icon.
2. Find and tap Data usage.
3. Find and tap the desired application.
4. Mark the Restrict background data checkbox.
5. To access more specific settings for the application (if available), tap View app settings and make the desired changes.

Note: The performance of individual applications may be affected if you change the related data usage settings.

To view data transferred via Wi-Fi

1. From your Home screen, tap Apps icon.
2. Find and tap Settings > Data usage.
3. Tap Menu icon, then mark the Show Wi-Fi usage checkbox if it is not marked.
4. Tap the Wi-Fi tab.