Use the Application manager menu to view details about the apps installed on your phone, manage their data, and force them to stop.
Swipe left and right to select one of the three tabs across the top of the screen to view detailed information for DOWNLOADED, ON SD CARD, RUNNING, and ALL apps. Tap an entry to view more information, tap Stop (or Force stop), then OK to stop an app from running.
Tap the Menu icon (at the upper-right corner of the screen) to access Sort by, Reset app preferences, Reset default apps, and Uninstall apps.