Samsung SCH-R810ZKAXAR - Manual (Page 78)

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Disabled Apps
You can install new apps even if the memory of your phone is full
by partially removing (disabling) apps you haven’t used recently.
When you need to use a disabled app, you can restore it at no
additional purchase cost.
Restoring Apps
Disabled apps can be quickly restored at no additional purchase
cost. To restore an app, run the application you want to restore
from the Main Menu. You will be guided through the restoration
process.
Expired Apps
Apps that were purchased based on the number of uses or time
expire. You can purchase additional uses from the MobileShop
catalog.