Some applications aren't ended completely when your phone returns to standby mode, but keep running in the background unless you end them from the list of active applications. Follow these instructions to end active applications.
Step 1 of 5
Find "Task manager"
Press the menu icon.
Step 2 of 5
Find "Task manager"
Press Task manager.
Step 3 of 5
End active applications
To end one application: Press End next to the required application.
Step 4 of 5
End active applications
To end all applications: Press End all.
Step 5 of 5
Exit
Press the Home key to return to standby mode.
Find "Task manager"
Press the menu icon.
Press Task manager.
End active applications
To end one application: Press End next to the required application.