How to turn off background data Samsung galaxy Ace
Settings> Account & Sync. Settings> Background Data. You have to make this choice.
Open your device’s main Settings menu.
Under “Wireless & networks”, select Use data.
Touch the menu icon (depending on your device, your Menu may look different).
Make sure that the “Limit background data” option is unchecked and that the “Synchronize data automatically” option is checked
Note: On some devices, your options for background data may be under Settings> Battery and Data Management> Publishing> Background data.